Effing hell, I forgot about RadTech when looking for a mouse.
RadTech has been around for ages. I don't know if that says anything about the quality of their mice, but they've been doing it for a long time, and I was interested in one of their BT mice a long time ago.
Anyway, just bought a VX Nano myself. I don't care about losing a USB port with that tiny sensor. I'm going to love that mouse once I get it. 🙂
The only other mouse I considered was the MS Notebook Mouse 5000, and unless you get special software (there's 2 different ones) to reprogram the button, you can't even use that other button effectively. You can only use it with Spaces (assuming you have Leopard).