At the weekend I sat down and took some time to go through Seth Godin's Web 2.0 list to see what was out there.
The usual suspects are at the top but I wasn't looking for the volume but the movement that shows increasing; albeit brief maybe, popularity.
After a long trawl a couple caught my eye for further research and some I went as far as registering.
More than a cursory glance:
What comes out of my walk about is the niche of it all. Some of the sites look good but are obviously meant for a very small number of people. Still it's good to see that in many cases the internet is becoming easy to use that some of these groups and sites exist at all.