I run http://bitcoinstatus.rowit.co.uk/. We have no income from it but it takes a Amazon EC2 small instance and a bit of bandwidth to run it. We get the odd donation (thanks very much to those people) http://blockexplorer.com/address/13Tn1QkAcqnQvGA7kBiCBH7NbijNcr6GMs but as you can see a lot less than the few hundred dollars a year it costs to host.

Is there anyway we could add to peoples forum signatures a signed link that showed what they had donated too?

I think if blockexplorer.com added a new link that was /address/pubkey/forumname/signatureOfUrlUpToLastSlash, then it would check the signature and only display a page if the signature was correct.

We would then need some sort of register of donation address, so the page showed who they had donated too.

Might encourage people a bit during Bitcoins current voluntary phase.

Maybe someone has a better idea to help encourage innovation?