No Market Share movement for WordPress 2.9 yet sorry.
Get a list of 66,922 websites using WordPress 2.9 which includes location information, hosting data, contact details, 28,205 currently live websites
which includes 11,345 domains that redirect to sites in the list. 50,062 sites that used this technology previously and 8,046 websites in the United States currently using WordPress 2.9.
Distribution of locations of all WordPress 2.9 customers we've ever tracked.