I was thinking perhaps you could start up a donation section or something (I'm sure some people can sacrifice 5 dollars here or there) to help with the site. You can reward such act by bumping them up to a Star/VIP User group which gives them whatever you can figure out. A good idea is probably colored usergroup title, perhaps if possible a decorated post, perhaps new skins solely accessable to those in the user group. Perhaps use the money to help increase server bandwidth, perhaps bump up the forum from Simple Machines to VBulletin. I doubt if you'd wanna do that but it was an idea.