I love the wired keyboard because I don't like to waste batteries when I never move my keyboard. But both are awesome. I don't think you can go wrong with either.
I just hope that when you make your decision in how ever many months, you don't make a new thread. I'm a big fan of the Logitech diNovo Edge Mac Edition.
The wireless doesn't have numpad, which render it useless, at least for my use. Also, when parked on the same place all the time i really don't see any benefits with the wired one, you also loose the usb hub which i find handy