Interesting thing (stop me if you've heard this one) - if you go to last year's championship page on first's website:
http://www.usfirst.org/robotics/2005/chevents.htm
And click on the pages with the listings for the divisions, you'll see a list of teams, including some with numbers in the 1900's. I may be mistaken, but I think that new teams this year have numbers over 1750 or so, leading me to believe that, even if they are still in flux, the official FIRST division lists are up!
Of course, I could be wrong, it could be some weird internet fluke.