Another victim of the "Power On" bug. Just got my N800 from Amazon 2 days ago. Everything worked fine until I shut it down to update to OS2008. After that - nothing. Dead on the water. Removing the battery for about 15-20 minutes did the trick to my relief. Worked the rest of the day without any problem whatsoever.

Just shut it down again to try updating again and I had the same problem. Tried several of the suggestions in the forums, but still I have not made it work again.
Hope I can update to OS2008 and after that I won't be shutting it down unless it is REALLY necessary.

Goes without saying that this is VERY annoying, although a working N800 is a thing of unearthly beauty