I'm quite happy with Dell wireless keyboards, that I got as cast-offs. One is a KM7321W. A drawback is that their peripheral manager (which allows you to do thi

I'm quite happy with Dell wireless keyboards, that I got as cast-offs. One is a KM7321W. A drawback is that their peripheral manager (which allows you to do things like reassign keyboards and mice to the little dongles) only seems to run on Dell machines. They've also got Bluetooth. If nothing else, they come with Dell machines, so if you're in a typical corporate environment, somebody might have one and let you try it.