I really like this directory of web 2.0 sites for the variety of names and logos that have proliferated (spread) in the last few years. It is much easier to make a web 2.0 site, it only costs, on average, about $100,000, where in the year 200 Internet bubble the average cost for a site was about $1,000,000. These sites all have a few things in common: they are simple, they do one thing and do it well, and they are almost all free. Explore, enjoy, spend some time. Or look of a specific kind of site, as well. Go2web2.0.