I am currently in the process of writing a program that allows you to use the N900 as a keyboard and mouse over the network (not bluetooth). For coding on the device I tend to mount the N900 using fusemount under Linux. As for running things on the device over the network I tend to use ssh and VNC. Although I use Synergy quite often I cant really see the benefit of using it with the N900. If you do please enlighten me.

Just a quick though does X forwarding work on the N900 over ssh?