PdaNet for Windows Mobile (32-bit Desktop Installer)
Full user review
"Great APP. Work Well with HTC Tilt2"
Easy to connect
Fast. Faster than the Verizon DSL house connection.
Able to still make and receive phone calls and texts while using internet on pc connected with usb ( have not tried wireless connection yet).
Little pricey but at least no monthly fee.
I have been using PDAnet only a short time but like it very much. I am in a rural area right now but with good signal and speed is great using my HTC Tilt 2 through AT&T. What sold me on it is the ability to still use all of the features of the phone while also using it as my modem. This is a winner IMHO.