This is a question Ive been asking myself for many years. It's too much more productive to have my hands close to the trackpad at all times, while typing, using shortcuts etc. Since I use both a macbook-pro and an iMac this is an issue for me. There must be TONS of others agreeing with me, so why haven't Apple made this a desktop-combo yet? I mean seriously; I'm close to contacting a factory to get it made myself..!! Why do I have to move my arm back and forth between a mouse/trackpad instead of having the trackpad below the keyboard like on the MacBook Pro? I also find the standalone trackpad too big. Anyway - just needed to get this out there.