Via Slashdot, I found this Ars Technica review of the radioShark. Solid details over four pages, with ample illustrations. I didn’t learn much, to be honest, but I read the whole thing hoping that maybe there was a workaround for the main issue: no guide. There doesn’t appear to be, although in the Slashdot thread, I learned about RadioTime, which is offering a guide, and will (the Slashdot poster said) work with the radioShark soon.
Reality check: I wasn’t using mine regularly before the iMac issues, and since the iMac returned from its bad RAM trip, I haven’t plugged it back in. Also, of all the crazy typographical conventions… radioShark?? I’ll try it again eventually, but I have no time for listening.