The potential names for Fedora 15 include Asturias, Lovelock, Pushcart, Sturgis, and perhaps the most normal name is Blarney. Personally I'd pick Blarney or Pushcart.
Voting for the Fedora 15 codename ends on the first of November while the name should be announced a day later. Fedora 15 will be released early next year while we are just days away from the release of Fedora 14, which has been developed under the Laughlin codename.
Those Fedora contributors able to vote in this naming election can find the voting information within this mailing list announcement.