Hmm - I have some mixed feelings. On the one hand I often use the N810 on a plane, and while all the other people have to switch off their phone/pdas and haul out their laptops; I use my N810. (Phones arent allowed to be used on flights in my country, but computers are) The tethering-with-phone approach worked fine, but it meant 2 devices. If the N900 gets cellular, then it better be a great phone as well so it can feed off the 'one device' approach. I'm happy to hear about the faster processors. If they throw in TV (monitor) OI'm probably just about there with not carrying a laptop either. Anyone ever consider the idea of a docking station for the tablets? So I just carry my N900 around and plug it into a dock at the office and home to get big keyboard and screen? Of course I would need a proper word processor and spreadsheet......
hmm, SIP. from my limited understanding, SIP is only about setting up a connection between two parties, beyond that there is no single say about what codecs and so on to use ones that connection is in place... and i dont think skype even uses SIP, but some other homegrown solution...