jQuery version 1.4.2
http://blog.jquery.com/2010/02/19/jquery-142-released/
JavaScript Libraries and Functions
Get access to data on 6,043,216 websites that are jQuery 1.4.2 Customers. We know of 1,155,434 live websites using jQuery 1.4.2 and an additional 4,887,782 sites that used jQuery 1.4.2 historically and 667,391 websites in the United States.
Get a list of 6,043,216 websites using jQuery 1.4.2 which includes location information, hosting data, contact details, 1,155,434 currently live websites and an additional 645,079 domains that redirect to sites in this list. 4,887,782 sites that used this technology previously and 667,391 websites in the United States currently using jQuery 1.4.2.