Here are a few Twitter dating applications from the Twitter Fan Wiki.
Radaroo – Simple and free Twitter dating application.
Twitcush – Declare a Twitcrush on someone, see who has declared one on you! (Great for getting the attention of Twitterati.) (By @missburrows)
bubble – bubble helps you find someone based on your tweets, friends and followers. (Geeks call it semantic dating engine.) (By @twitbubble)
