What License to release under?

[SarcasticDwarf]

I am looking to offer up most of the database for my site (IBL listed in sig). Can anyone reccomend any licenses I can release this under (one that prohibits commercial use but allows modification if released under the license, etc)?

 

[Amorphus]

go with the crowd! release under GPL!

 

Creative Commons License is nice, but it doesn't have a huge following except for Movable Type.

 

DP.