Subject line says it all. We hit 100,000 back on March 5, and 200,000 on April 6. I forgot to note when we hit 300,000, but it was sometime around mid-May, and I'm too busy right now to go back and check in the data archives. Technorati is currently tracking about 3,000 new weblogs per day. Andrew Anker makes some interesting predictions based on the numbers.