Clippool
Here at work I use two computers and have different applications on each. Sometimes I want to copy/paste from one computer to the other but never knew how. So today I looked into it and came across clippool.
Clippool.exe is a command-line utility (available in Windows 2000 Server Resource Kit) that allows you to transparently share a single logical clipboard between computers that are running either Microsoft Windows XP, Windows 2000, Microsoft Windows NT 4.0, Microsoft Windows Millennium Edition (Me), or Microsoft Windows 98. After you install and configure Clippool.exe, use it to copy and paste information from programs between computers on the network. For example, you can copy a screenshot on one computer to a document on another computer.
Information on this cool utility can be found here. It is really easy to setup (just copy the clippool.exe into the System32 folder of the two computers and follow the instructions). BTW - you can download the resource kit from MSDN if you have a subscription.