Griffin Technologies is finally shipping their radioSHARK, a USB-powered fin-shaped AM/FM radio with time-shifting for both Mac and PC. Of course, a unit like this lives and dies by the quality of its software, so unless you're just dying to record FM-quality audio into AIFF files over USB, I would probably wait for someone to get a review or two out into the web before plunking down $70.
Product Page [GriffinTechnology]
Update: And here we go, a review from PowerPage. Looks pretty decent!
Exclusive Review: Griffin Technology radioSHARK [PowerPage]