If you like Twitter, you will love TipDrop. At TipDrop you can give and receive tips on just about anything.
There is a credibility rating to help keep junk tips out of the picture. You have more characters for leaving a tip than for tweeting on Twitter, so you can actually say something useful.
You can have up to 10 links to your own websites and if you have a google adsense account you can share in the adsense revenue.
TipDrop, which is new, has had 1,151,449 page views in just ONE WEEK. Pretty cool huh! Check it out: TipDrop