Are you talking about a back up of messages or send receive txt via your computer?
Backups can be done to your SD card and transfered via usb connect or ftp transfer or any number of alternate ways.
As for txt interaction I have been using SMS2PC for a year now and it works excellent. I havent seen his site up for a while now but when it was running it has suport for window mac and linux. works smoothly on all three.
"People not things effect change."
Steve needs to learn this, ditch the iPhone for an open world.
Android - Linux for the people.
The Techno Mage
Moto D PRO | HTC DhD | NOOK COLOR cm7bt