No Market Share movement for WordPress 2.8 yet sorry.
Get a list of 49,231 websites using WordPress 2.8 which includes location information, hosting data, contact details, 15,449 currently live websites
which includes 1,653 domains that redirect to sites in the list. 35,435 sites that used this technology previously and 6,740 websites in the United States currently using WordPress 2.8.
Distribution of locations of all WordPress 2.8 customers we've ever tracked.