I'm already a pretty happy customer of TextFree Unlimited for months, but I couldn't help but wonder, is there an SMS app I can use for my iPod Touch that will at least let me have a real number that I can use? Or is it always gonna be just some email address? And what about an app that has both SMS and MMS? There are just so many apps out there dedicated to SMS and MMS and VoIP, I'm just trying to be safe and get one that I know would be worth the money, based on the experience you guys may share. Thanks in advance! Oh and P.S. It would be great if it was one that was compatible with most U.S carriers like Verizon, Sprint, AT&T, etc.