This isn’t real estate related, but it’s too cool not to share. You can sign up for Square for free, and they send you a free reader that plugs-in to your iPhone headset jack. You can then swipe someone’s credit card on the go anywhere your phone works, and automatically charge their credit card, with the proceeds sent to you! The only fee you pay is the normal payment processing fee that is charged by all credit card processors. The fee is very reasonable and this service allows you to do this all without setting up a merchant account, which can be very time-consuming.
Just thought of the real estate application for this: you could use this app to charge a delinquent tenant for rent while you’re standing with them at their unit! No more, my check is in the mail, or bouncing checks!
Check out their site: About Square