Wow. Seems like a large horde of people in Planet Fedora are jumping ship from Twitter to Identi.ca.
While I do have a twitter account, but I'm not that active. Anyway, guess I'll jump to the identi.ca bandwagon too in the spirit of supporting FOSS : http://identi.ca/kagesenshi.
/me anxiously wait for desktop integration (twitux, or similar), and phone based client (jtwitter or similar).