Mike Arrington probably covers less than 5% of all Web2.0 startups.  Note: this is just a number I pulled out of the air (or bottom — you decide).  Anyway, there are a ton of them that don’t get any kind of mention.  I get solicitations from time to time, but there’s a dizzying long list of them, some of whom get mentioned at Emily Chang’s eHub, which is a hand-picked list of them (but not by Emily anymore), and other places like Killer Startups, which is sort of like a combination of TechCrunch and Digg.