RemoteDroid turns your phone into a wireless keyboard and mouse with touchpad, using your own wireless network. It’s a free application for phones running Google’s Android operating system.
RemoteDroid consists of two parts:
The phone application you can download from Google’s Android Marketplace ( search for RemoteDroid in the Android Market ), and a companion server application for your computer that you can download here RemoteDroid server .
Once you download RemoteDroid server extract the zip and run RemoteDroidServer.bat file
Run RemoteDroid in your mobile, enter the IP address in your mobile as mentioned in the UI of the remote droid server
watch the demo by http://www.youtube.com/user/jenstopcom
RemoteDroid is open source : http://code.google.com/p/remotedroid/
check remotedroid blog for more details : http://remotedroid.net/blog/