Also just picked up the Logitech DiNovo Edge. Must say that it is a spectacular keyboard. The Zen-simple philosophy is clearly contrasted against Microsoft's cluttered 7000/8000 series.
Some Thoughts:
Programmable keys only work in PC unfortunately. Doubt if they will ever release Mac Support which is a crying shame when you consider that every single mac comes with Bluetooth built in!. In fact, I bought the keyboard to pair with my (yet to be purchased) mac mini. But I think I'm going to get another one for my pc.
Keys - excellent tactile feedback, nicely spaced out and not noisy at all. One of the best keyboards I've typed on.
Battery Life and charger - Would have preferred a simple USB cable charging solution so that the keyboard can still be used while charging. Have only been using it for about a month, so cannot really comment on the battery life
Touchpad - a little too small, but the vert/horiz scroll on the edges of the pad are really nifty.
Volume control - OVerkill. takes up lots of real estate, has flashy lights, but really, a simple two button set up would have sufficed.
Looks - It looks really really sexy. Was designed to be showed off. So if you have an ego to feed and $400, go ahead. Lowest price I was quoted for the Edge at SL was $386 about 5 weeks ago.
GRIPE: Distributor for Logitech in Singpaore is really taking a huge cut for their troubles. Arguably, MSRP is USD 199 - SGD $300.00. However, MSRP is usually 30 - 40% higher than what Logitech charges the retailers.
I got my keyboard at USD140.00 - SGD210.00. So no warranty and support in SG, but hey, if it croaks, I'll just go buy another one and still it would only cost about $20.00 more than if I had bought it in SGD.