You can do everything through wifi with a linux desktop and:

• ssh server on desktop pc to connect from n900 whenever you wish without having to give conferm on pc. You get full command line to launch all scripts you need.
• Presence vnc for getting the desktop on n900 or any other vnc app. You can use mouse and keyboard aswell.
• setup a vpn so you can access your pc from every place where you get internet. It's also secure since it uses ssh connection aswell.