Hrm, instead of ads, why not a "bake sale" to raise money?
We did this on Wet Canvas! to raise money for the tsunami victims. Not equating this with that type of disaster, of course! The premise works, though.
What we did was "donate" artwork in a thread, then sell that piece on eBay. The money from the sale, minus shipping if it was included in the purchase price, went into a fund for the victims.
It would take a lot more stuff to raise the kind of money we raised -- our stuff depreciates, artwork doesn't -- but it still might help. Especially if a few people have a lot of junk to get rid of or rare fish or eggs they can "donate".
It doesn't have to be aquaria related either. Just stuff "donated" to AC. I might have a couple of paintings kicking around that I could auction for funding.
I just hate advertising and it would be nice to get one "lump sum" to play with, y'know?
On the other hand we could do *both*. Use the money from the sale to upgrade or improve the forum and money from advertising to pay for bandwidth.
Just a thought,
Roan