wireless keyboard

Depending on the model of the keyboard, you can use it with both devices. (I'm under the impression that older models of the AWK may be problematic but I don't know that for sure.) However, you cannot pair the keyboard with both devices simultaneously. You'll have to "forget" the keyboard on one device before pairing it with the other.

 

Apps like HippoRemote will allow you to use your iPad as a remote mouse and keyboard for your Mac. I connected my Apple BT keyboard to a 3g iPod Touch and tried running with HippoRemote. The BT keyboard's input was recognized by the HippoRemote app during config, but I couldn't find a way to have it pass through the keyboard typing to the Mac.

I launched a new thread in the iPad Software forum asking if any of the remote apps can do this. The OP may want to watch that thread to see if any of iOS apps have that capability.

Update: HippoRemote does pass the keystrokes through the iOS device to the Mac. To run it as desired, you first hit the keyboard icon on its display, then the push-pin icon to make the keyboard persistant. The main limitation is that control-characters don't work correctly: Command-TAB doesn't work. The developer says that the BT API doesn't send modifier information to the app. The OP will have to decide if those limitations are a show-stopper.

Personally, I think this is a pretty cool little app. I am constantly amazed by the inventiveness of iOS App developers; that definitely includes the developer of HippoRemote.