I have a htc hero and my windows 7 pc has a bluetooth dongle. Is there an app that will allow me to use my phone as a keyboard and/or mouse?
Yes. Gmote has a "touchpad" mode, which also lets you use it as a keyboard.
Yeah totes. There's this really cool android (and iphone, i think) app. Let's you use your touchscreen phone as a mouse and also type with it too. It's called "Remote Mouse". I've tried it and it works very well. Very very minimal setup too. Just install server on your PC, install app on phone, hit connect!