I just received My N800 from Newegg today.
After charging battery for required time unit initially powered up.
However I turned it off to see if I had one of those units that won't turn back on. It did not turn back on for 15 minutes.
I reflashed to 2008 issued a few days ago and it seems to get rid of power on issue.
My issue is with Nokia. They have not done anything to pull these units from vendors to fix issue.
Granted they issued fix but it should not be responsibility of customer to fix there issues.
I bought N810 when it first came out but returned it because GPS was crap.
Nokia seems not to care about their reputation for building quality product.