How to type SMS in a full sized keyboard?
Check out WiFi Keyboard -- allows you to use your desktop's keyboard to control the Android.

NB: I have not personally tried this, but it looks pretty cool. aimed particularly at apps that require keyboard input, but still don't pop-up a virtual keyboard......

Again, WiFi, not BlueTooth. aaargh. Unless, you know, you get your PC to broadcast on BlueTooth.