Ditto what Bob K said. It’s what I plan to do with my private loans - but here’s more information for you:
The Sallie Mae private loan consolidation program started at the end of April. They do a credit check, and depending on your FICO score you can get a rate that starts at prime and then moves up from there if your score is less than perfect. *But*, you can get a cosigner with excellent credit and get a rate closer to prime, and after two years of repayment you can remove the cosigner completely from the loan. The best part is that repayment can be for up to a 30 year term (maybe not for smaller balances, but ask anyway).
The White Collar Ruckushttp://whitecollarruckus.libsyn.com

Try Sallie Mae