Continuing the count on the different kinds of content out there. Be sure to check out parts one and two.

The Social Sites. Who would have thought a couple of years back that millions of us would now be building mini-websites out of content filched from music videos or upload silos and comment content from friends? When social networking got going five years ago with social text, it looked dreary. Groove did nothing to convince me otherwise, though it got Ray Ozzie a CTO job at Microsoft.

Back then all computing operated inside the paradigm of ultimate discipline. Software marshaled our behaviour. Today's social networks look a real liberation. The latest play in social networks is Wallop. There is of course a tracker for social networking websites over at Mashable and I picked up on Wallop there. Wallop is the all-Flash version of social networks which must take it somewhere along the road to Second Life.

Among the sites to look out for apart from the obvious Myspace, Facebook and Bebo is Facebox, a European site that's been growing slowly over a couple of years.

Social networks have of course innovated on the revenue side, charging money for virtual objects and imaginary real estate. Hard to see that one playing out in front of a VC. And have the kind of numbers that attract advertisers, and a video ad service in Videoegg.

I find an interesting area of social networks the move towards the YouTube territory and YouTube's response, for example setting up specialist areas for performers like musicians and comedians. In fact performers had begun using YouTube and MySpace this way long before the channels were created.

Social networks may ultimately all occupy the same space as video upload sites and IPTV channels. They have the numbers, like Google, to migrate around the web looking for business models. It's scary to see new worlds so quickly made.

Digital lifestyle aggregators (DLAs). DLAs seem to be the next step forward, - sites where all your digital data resides - your Amazon Wish Lists, De.licio.us (social bookmarking) account, RSS feeds, and presumably Outlook, RYZE, Linked in and other kind of data. Broadband mechanics seems to be the cheerleader.

Blogs. Blogs have clearly come into their own in a small number of cases, sites which dominate the news spectrum in an industry (Techcrunch, Scobeliser), or in taste (delicious days) or parenting (dooce).