While compiling an article for my e-zine this week, I came across some interesting information regarding popular blog platforms. 

The blog platforms of choice among the top 100 blogs | Royal Pingdom – An analysis of the top 100 blogs on Technorati (January 15th, 2009).

Top five blog platforms | News Blog - CNET News – Though old (February 8, 2007), this has some useful commentary and links.