The "chicklet" keyboard, as so many people call it, is indeed 1.2 cm longer than the eDGe, but only half its width and is NOT a full-sized keyboard (i.e. it does not have a numerical pad). The Microsoft keyboard is WIRELESS, which will currently NOT work with th eDGe until Entourage enables full bluetooth capability with it; also it is longer than the "chicklet" keyboard by about 2.2 inches and much wider as well.

Besides, the "chicklet" is only $15 USD vs. $60+ USD for the Microsoft Arc Wireless keyboard---so you could buy 4 "chicklets" for the price of one brand-name low-profile keyboard that does the same thing as the USB one!