A dual keyboard setup! Unnecessary? Perhaps. But it does prevent you from straining if you are typing ‘at’ something on the second monitor, which you want to look at whilst typing.
It’s also useful if you want to have something open for reference and glancing at up on the white MacBook screen (*cough* Twitter *cough*). Just don’t need to type anything on that machine. And if you do, you hook up the wired Apple keyboard to that machine instead.
Do yourself a favor and check out synergy! Dual keyboards/mice are a thing of the past!
I would, but there’s something about sending my keystrokes over a network connection that gives me the creeps.
It’s irrational, probably, because there will be well-done encryption in any robust solution that’s worth my attention, but still — I can’t shake that horrible feeling.