I got given a Magic Trackpad as a late Christmas present. Paired it with my first gen C2D Mac Mini and it seems to be working quite nicely. I'm not sure I'd say it was worth the £60 it costs to buy here as its even more expensive than the wireless keyboard but as a present I'm not going to complain

I normally use the Mac Mini with a wired USB Intellimouse but I'll give it a go with just the giant trackpad. I don't think there should be too many issues with switching as I don't play games on the Mac ever and I'm fine with the touchpads on laptops. I would have still prefered a wired version so I don't ever need to worry about batteries tho...

If I can be bothered to dig out a USB Bluetooth dongle then I might try it with my Windows desktop with the modified boot camp drivers.