No Market Share movement for WordPress 2.3 yet sorry.
Get a list of 6,067 websites using WordPress 2.3 which includes location information, hosting data, contact details, 1,842 currently live websites
which includes 159 domains that redirect to sites in the list. 4,384 sites that used this technology previously and 770 websites in the United States currently using WordPress 2.3.
Distribution of locations of all WordPress 2.3 customers we've ever tracked.