I'm wondering how some of this stuff is going to be grouped. Are there going to be very big general 'things' like blogging, social networking, etc.? Because it sounds like all of these things that are being mentioned are great ideas but not enough to have whole tutorials on or pages dedicated to. Or would the general things classification be too hard because where would you put certain sits? Would twitter go under blogging (since it claims it's 'microblogging') or would it go under social networking or chatting?
A lot of this stuff, like IMing is great and it's what Librarians are getting asked for, so it would be sad to see it get the boot because it's not a big enough thing. So how big or small are these 'things' going to be is my roundabout question.
Also, in the chatting vein what about meebo? :)