They should stay flat for a while IMHO, but Greenspan wouldn't feel like he has a purpose if he did that.
If we were experiencing inflation there would be a reason for a rate increase(s)... the only real inflation has been due to the price of fuel (which is starting to decline) and if anything IMHO is a reason to keep rates down, not increase them putting further strain on a fuel-driven economy. WHY did the President re-nominate him, anyway. Watching his wife they are no friends of Bush.