From Discrafts website:

2008 Ace Race Disc Approved For Tournament Play
The 2008 Ace Race prototype disc has now been approved for PDGA tournament play, which will be good news for the thousands of disc golfers who are already carrying it in their bags.

A slightly overstable midrange that fits into the Discraft line-up between the Buzzz and Wasp, the disc may be released to the general public in the Spring, when it may be renamed 'Nebula'. All Ace Race copies are now legal.

I think Martin has some more of these to buy so you should hit him up for one or two. I have some 160g that I like and will probably try and get one closer to 170 from him if one of my four isn't already. I think most people had a good time throwing them during the Ace Race this year.