I need info on US blogs volume and traffic distribution, including:

1. Current number of blogs and blogs readers in the US.

2. A traffic distribution table - e.g. 0.5% of blogs draws over 100K
sessions/day, 2% of blogs draws 50-100K sessions/day, etc.

3. Info must be current.

4. Source for traffic distribution must be reliable, and could be
industry survey or even single large blogs host statistics (only if
over 1M *active* blogs are hosted - e.g. Livejournal).

Thanks,
Eliahu