I'll probably upgrade eventually... but not right away... and my experience with getting fish that will outgrow a tank, they'll outgrow it way before I'm ready to upgrade. Its too bad too, I was really diggin' putting Barbs in there, but they would NOT play nice with the fish in my 30-gallon tank if I had to move them.
There are 7 fish in my 30-gallon that are not compatible with barbs because of their large fins (Betta, Black/White Skirt Tetras). I also don't think I could move all 7 to the 12 gallon - it would be a little overcrowded I think.
Anyway, thanks for the responses... I'm really not sure what to do yet. Might have to just go community again and get some peaceful fish. Maybe a nice big Neon Tetra school or something...