I haven't tried it on the Iconia (though we have one at work) but I'm using my apple keyboard and trackpad on my xoom right now. (Tiamat 2.1)
It works as a great input device. You get multitouch, two fingers left and right work as back and forwards.. pinching etc works. it recoginises as many fingers as you can put on it so it makes a great gesture friendly device for the tablet. Just turn up the sensitivity a bit.
pawz