Is it possible to share a keyboard physically connected to a Windows 7 PC with an iPad 2? I have an iPad 2 and a Windows 7 notebook.

Is it possible to, without jailbreaking, share the notebook keyboard with the iPad?

Maybe some application installed on Windows could expose keyboard through Bluetooth?
The JUC400 Wormhole switch will do this.  There are a number of other solutions mentioned at How can a keyboard be shared with an iPad?.