Mail + Social networking?
One identity for all sites?
Integration between all social networks and IM services?
Which web services should be integrated in the future, and why?
By "integrating", I mean that two or more services should be seamlessly connected, and that connection would benefit the user. Foe example, I would really like to have an IM application that would support many accounts on many IM providers (And IMHO, Pidgin's not ready yet).