Elise Bauer has published an update to her overview of blog tool market share and has determined that:

– the number of blog sites has grown 120% in six months,
Six Apart, (my employer) with the acquisition of LiveJournal, has the largest market share of blog sites,
– It’s impossible to measure the business market which sits behind firewalls,

Elise admits that using Google and Technorati for your research tools is crude at best but it’s the best guess out there and this report is the best report out there since Forrester’s, Blogging: Bubble or Big Deal? When and how businesses should use blogs last November. The two reports together make a compelling case for why businesses should be blogging and which tools they should use.