Hi,
I had the same problem a while ago. I like building little projects, but im useless when it comes to programing! I needed several inputs so that I could temperature compensate torque transducers with a full bridge a few at a time. I made my own strain gauge amplifier using the INA118 which is quite cheap and easy to build, and outputting that in a USB interface. Any really can be used, but I chose to buy the USB-1408FS from Adept Science which accepts 8 inputs at once. It comes complete with easy to use software, with the ability to do pretty much anything with the results you get back from it.. if you have the time.