[Lost_BiomedE]

YMMV, but I have found advertising with banner ads on targeted user forums gets good return for a small dollar. I always email the admin and have not used any ad placement services. It does not scale well, so eventually a transition is required.

[csouth]

This one I'm working on currently. I'm trying to find the sites that deal with unsigned artists / smaller artists to try to get some advertising space. Thanks for verifying this was a good choice.