[Shohan]

I just use Remote Desktop Mobile. It works great. XP was a bit choppy at times, but Vista seems to connect great. All I had to do was forward port 3389 from my router to my PC and for ease I setup a DynDNS entry so I can just go to a url instead of an IP.

A VPN setup is an option too. I've got an OpenVPN server running on my router as well and the OpenVPN mobile client on my Mogul. Works well enough.

Basically, all of the options are going to depend on bandwidth. Both options don't require an extra process to be running on your PC either unless you don't want to run the OpenVPN server on your router which I use DD-WRT to do.