From my point of view, his two most important points are:
The price: The Nokia N800 retails for $399 and it is currently available. The iPhone will be $599 with a 2-year contract from Cingular.
Software: The iPhone will most likely not be allowed to run third party applications. The N800 however is open source and Nokia encourages developers to write software for it.
On the negative side though, the N800 internet tablet requires a bluetooth connection to an actual cell phone with a data transfer plan if you want to browse the net away from a Wifi spot. It looks like a very affordable, full-featured internet tablet though.
Via: Darla Mack