The blog that can possibly claim to be the busiest on the web is a geeky tech related blog called Slashdot. You can find the latest five headlines on the right hand side (courtesy of an RSS feed and this plugin). While it is often opinionated and contains poorly written summaries more often than not, it has its own subculture and a full Wikipedia entry.
For what it’s worth, sometimes Slashdot is ahead of the curve. Some users are genuinely involved in the tech news that is reported on the site, and give interesting and valuable insight into the project or story that is mentioned. See this post to an article submitted and replied to by Bruce Perens, for example.
If you’re into Linux, tech, gaming, or just plain random comments about science and students doing wacky things, then you could do worse than to tune in.