I just read over at wired that somebody has created a payment system that uses text messages to send money - much like what paypal should be doing. The service is currently only available via SMS messaging, but I would be shocked if they don't offer a paypal esque system in the future.
If you sign up now, you get a free $5 signup bonus. Check it out here.
Full disclosure, if 36 people sign up using that link by the end of february, I get an xbox 360. I'm not much of a gamer, but I do like xbox 360s. So, help a guy out - sign up with that link.