jQuery version 1.4.2
http://blog.jquery.com/2010/02/19/jquery-142-released/
JavaScript Libraries and Functions
Get access to data on 5,655,677 websites that are jQuery 1.4.2 Customers. We know of 1,353,819 live websites using jQuery 1.4.2 and an additional 4,301,858 sites that used jQuery 1.4.2 historically and 751,678 websites in the United States.
Get a list of 5,655,677 websites using jQuery 1.4.2 which includes location information, hosting data, contact details, 1,353,819 currently live websites and an additional 324,675 domains that redirect to sites in this list. 4,301,858 sites that used this technology previously and 751,678 websites in the United States currently using jQuery 1.4.2.