(Edit - sorry guys, looks like the promotion's ended)
Now that's an attention grabbing title, right?
I was referred by Beachgirl to RevolutionMoneyExchange. It's similar to PayPal, in that it's a way to send and receive money online, but they're trying to add additional perks. It's designed as an easyway to exchange money. Need to pay someone back for dinner? Send them money through MoneyExchange. Your roommate still owes you for this month's rent? Send a request through MoneyExchange. It's all free, too, which is great.
The best part though, is that if you sign up, you get $25 in your account. And if you want, you can immediately withdraw that into your bank account. Or you can use it to try out MoneyExchange, which is what they hope you'll do. Either way, free $25. If you comment here with your e-mail address (I will delete the comment afterwards, if you want), I will send you a referral link. It gets me $10, which I will add to my "charity" account, and it gets you $25. Great deal for all involved, right?