We're using the Microsoft Wireless Optical Desktop for Bluetooth with the Mini, which works pretty okay. I had some issues at first getting them to talk reliably, but setting the Microsoft Keyboard and Mouse as 'favorite' bluetooth devices seems to have solved the problem. We'll see how useful it is to have keyboard and mouse that are battery-powered.
I also upgraded my laptop to the latest stable release of Ubuntu, codenamed "Breezy Badger". I did it mainly because I read a favorable review of Network Manager, (which aparently was not available for the "Hoary Hedgehog" release of Ubuntu), but when I installed NM, it doesn't seem to come up. Have to troubleshoot that later.