There are a lot of threads out there collecting bounties and trying to raise BTC for various projects to promote bitcoins.
I just created a site that I think will make this process easier.
It allows people to form groups. These groups have a fee to join which goes into the group treasury. The group members then vote to determine how to spend the group treasury.
Basically it allows you to form a mini-democracy.
It is still in alpha so a lot of things don't work correctly yet. But the basic functionality does.
Anyway check it out and let me know what you think: http://FiveGrinder.com