Stingray... you're getting into "religous" issues--are hard plastic buttons better than rubberized? Should there be a NPL/LIST button or is going through the TIVO button easier, are "soft buttons" (programmable/menu lists) better or is it better to program hard buttons to different functions... AUGH!
has tons of good info, and I highly suggest you run down to your local stores ( Circuit City comes to mind offhand ) that have a display of the different Remotes and pick 'em up and hold 'em. Then stop by the Logitech.com website as well.. I think there's a "test drive" area for programming the remotes. ALL are programmed the same way--you create devices and then create actions, then customize the buttons from there.
My personal feeling is that the Peanut is an Excellent layout--if Logitech would reasonably duplicate the size/layout of a Peanut remote in a universal remote package, I think it'd be a HUGE winner for the tivo/dvr crowd. I suspect there are copyright/patent issues to consider there though.