I was finally able to see TAR 15's first episode. Is it already too late to make a prediction? :) Anyway, I predict dating couple Meghan and Cheyne to win The Amazing Race. Poker players Maria & Tiffany, gay brothers Sam & Dan, and best friends Justin & Zev (who has an Asperger Syndrome) make good reality TV as well.
ETA (01/01/10): I was right! They won! :)