I don't know...
There was an OS upgrade for the 770 just this past month that seemed to provide some boost to the connectivity and such, so as of last month there was still support from nokia...one would hope they are following the comments here from their *customers and rabid fan base* and we will see a few things different with the 900 (bring the cover back please please please...)

It's a shame - everyone I've shown this thing to simply loves it - you'd think they would have done a little more with it, given the timing they had and the jump on all the other devices - now everyone says "oh - is that an iPhone ?"