Vanity Fair has done a great job of categorizing the major blogs in the cloud.
Via VANITY FAIR Blogopticon | vanityfair.com

LastGraph lets you explore your last.fm listening history. A very cool tool but it takes quite some time to process as the queue can get quite long.
Friend me on Last.fm! Here’s my profile.

I know this Twitter craze can get quite annoying for those who are not on it but I have to mention Tweet Clouds. Tweet Clouds will create a word cloud from your public twitter stream. The process will take about 30 seconds so you might wanna grab a cuppa or take a walk.
Take a look [...]