I don't have any product reviews, but I did come across this site:http://www.ergogeek.com/htpc-keyboard.html
No, I'm not affiliated with them. I'm looking to order from there at some point in the near future though. I'm about ready to smash my logitech keyboard / mouse set.
The 2.4Ghz models are what I'm looking at. I don't have a need for an actual 'remote' though, so I'm considering the models with the built in mouse / trackball solution.
The reason I'm looking at 2.4Ghz is because my logitech desktop combo is IR and the thing can be 6 feet away and flake out on me. The next day it can be 10 ft away and work perfectly. I hate inconsistency.