I don't know if anyone else has posted / listed this, but UPromise.com offer's some incredible deals and rebates (6% at barne's and noble, 2% at walmart, 1% at expedia, etc.)

If your not familiar with the program, the rebates must be applied to either an outstanding student loan, or a 529 account used for saving for college.

This seems like a very good deal, especially if you have outstanding loans.