I use an iPaq 3635 w/PDA-ir CF extender and TV Remote Controller software. I am using it with a custom CCF file and am quite happy with it. The developers of TVR 5.1 aren't very responsive, but overall, I am happy with the software.

If I was in the market for a new PDA based remote solution, I would check ebay for a good used iPaq 36xx, 37xx, 38xx. I would imagine you could pick one up for a decent price. After that, TVR 5.1 is $14.95 and the PDA-ir is $25.

Regards. Jay.