NITLE's Blog Census
How many people are blogging? In what languages? NITLE's Blog Census has hard data. The guy who wrote this (didn't catch his name) gave several interesting bits of data, including this gem: 2% of Icelanders have a Blog*Spot blog. There's an API. They also track weblog tool usage stats.
Update: Blog Census is by Maciej Ceglowski. Thanks Anil!
Update: Blog Census is by Maciej Ceglowski. Thanks Anil!