Just trying to gather information on what 07 888s got the "YYF" Premium collection logo and how many are out there. Thus far the only 07 888s I've seen with the "YYF" logo are some aquas, some reds, Aussie Gold, and the Snowcrush/Snowquake.
If you don't know, the 1st edition aqua 07 888s look like this:

The 2nd edition aqua 07 888s have the "YYF" logo:

Thanks,
Ben
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More details:
I've already talked to YYFBen about it. Enough time has passed that he's not really sure. He did state the following:
The first Premium Collection yo-yo was the G5 Elite
http://yyfpremiumcollection.googlepages.com/homeAn entire batch of aqua 07 888s with the Premium Collection "YYF" logo was rejected and the whole batch got B-grade stamps
Not every 07 888 created during the 07 888 Premium Collection era have the "YYF" logo (most special/limited editions and even some regular editions)
Timeline I've pieced together from Ben McPhee's old blog from the time of the announcement of the 888 up to the release of the 08 888:
April 13th, 2007: The 888 was announced, black stickered silver pre-release start going out as replacements shortly thereafter
May 1st, 2007: aquas (small batch with black hubstacks), Asia editions, Europe editions, Spingear/2007 Japan National editions and ocho8ochos start shipping, there are some issues with the large batch of aquas intended for most US online stores which causes nearly a month long delay.
May 27th, 2007: 50 pink ALLYOYO 888 become available
May 27th, 2007: the month long delay in shipping aqua 888s to US online stores is over. This large batch of aqua ship with white hubstacks.

May 31st, 2007: aqua 888s already sold out at YYN
May 31st, 2007: YYFBen says a small number of small bearing 888s are coming in a few weeks. More large bearing aquas will be produced in 4-6 weeks. Hints that an expensive Limited Edition is coming (this turns out to be the Higby/Mr. Yodel 888)
June 6th, 2007: National Yo-Yo Day, G5 Elite announced which carryies the "YYF" Premium Collection logo (although the Premium Collection isn't announced until later), over 1000 various editions of the 888 have been sold world wide.
June 8th, 2007: Higby/Mr. Yodel unveiled. 75 blue/purple made and sold via YYN.
June 12th, 2007: small bearing 888 production problems, far fewer will be released than planned
June 14th, 2007: YYF Premium Collection formally announced. 888 moving from Project Red Alert to YYF Premium Collection product line. "YYF" logo already found on the G5 Elite may be making its way onto 888s in the future.
http://yyfpremiumcollection.googlepages.com/homeJune 16th, 2007: YYF plans for the first batch of Premium Collection large bearing 888s to be done by August 1st.
June 16th 2007: 40 orange small bearing Augie Fash 888s are available directly from Augie
June 20th, 2007: 75 small bearing Team Edition 888s and 35 all silver small bearing 888s shipped. They don't have the "YYF" logo
July 13th (Friday), 2007: First pics of the Shadow and Stealth small bearing hardcoat 888s which were made available at Worlds. Neither have the "YYF" logo.
July 14th, 2007: the first batch of 888s with the Premium Collection "YYF" logo are shipped
July 17th, 2007: Another big batch of aqua 888s with the "YYF" logo are being built.
July 24th, 2007: Steve Brown 888 announced (which will end up not having the "YYF" logo)
August 1st, 2007: Worlds. Vashek given both of the only 2 standard marked (non-"YYF") red 888s, made specially for him. 5 custom purple 888s made for Yuuki given to Yuuki (
I've not seen these, anyone have a picture or know what they look like?). YYF sells at Worlds: $100 for aqua, sb silver, sb Stealth, sb Shadow, Aussie Gold (with YYF logo), $175 for ocho8ocho, Higby, Steve Brown
August 5th, 2007: Yuuki 07 World Champion 888 with piece of string used in Yuuki's Worlds freestyle imbedded in silicone response announced
August 16th, 2007: 888s expected to ship this week are delayed
August 31st, 2007: 888s have now been restocked at all stores twice. A European store is getting a signature 888 for a new team member (I'm guessing this was the Cherry 888)
Sept. 18th, 2007: 50 purple large bearing Augie Fash 888s have been made. Some limited red 888s (with YYF logo) were sold to a few people

Sept. 26th, 2007: Pics of YuukiQuake (no YYF logo) released. 51 AYYA 888s made in gold, red, matte gold and 1 black (none have YYF logo)
Oct. 2nd, 2007: US Nationals, Bird In Hand sells many YYF yo-yos: Stealth, Aussie Gold 888, SnowCrush/SnowQuake with YYF logo, G5 Prison Break, and some others. First peek at YuukiQuake and Jason Lee 888s (neither have YYF logo)

Oct. 8th, 2007: Yuuki uses what YYFBen says is "a unique green 888".
(photo by Sarah Jones, from her flickr account
here)

Oct. 17th, 2007: AllYoYo pink 888w shipped, Jason Lees and YuukiQuakes to ship in the next 6 weeks
Oct. 26th, 2007: YYN sells out of 45 aqua 888w in under 24 hours (these did not have the YYF logo). Large bearing white wall all grey 888s set to ship. The only small bearing 888w's ever made are set to ship... 25 all grey 888w's (no YYF logo)

Oct. 26th, 2007: a restock to another seller gets an exclusive range of colors: white wall red, gold, purple, Cherry 888. None of YYF logo

Oct. 31st, 2007: Jason Lees made available and sell out
Nov. 1st, 2007: the aqua 888 restock that was supposed to start going out to all stores worldwide a week or more back is canceled due to quality issues. Entire run is B-grade stamped. 08 888 announced to be released on November 21st.
Nov. 21st, 2007: large and small bearing raw 08 888s with YYF logo released.
So concerning the aqua 07 888s:
First small batch with black hubstacks shipped to mostly small or foreign sellers (no YYF logo) on May 1st, 2007
Second large batch with white hubstacks shipped to all US sellers (no YYF logo) on May 27th, 2007
Third large batch with white hubstacks shipped to all sellers worldwide (with YYF logo) on July 14th, 2007
Long delayed fourth batch with white hubstacks (with YYF logo) stamped B-grade and not shipped announced on November 1st, 2007
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Edit: Nov. 6, 2009. Here is my current collection of 20 07 888s.

- Ben