I was wearing a Gaia shirt at Sakuracon and a lot of people asked for my username, but that's about it.
One of my friends had better luck -- she went to Kumoricon (which is small and local and I'm going next month) and she ended up getting together with a lot of people on Gaia from that con.
[MADG] Hangout
Formerly the Mil-a-Day Giveaway, this guild is now a just great place to hangout and meet some new friends.