I\'ve got an ASP.NET application that uses a mixture of ASP.NET AJAX (Including UpdatePanel) and jQuery written by several developers of differing backgrounds.
Some
I would recommend the Ajax script loader (if you are working in an asp.net, asp.net ajax library, jquery environment)
http://www.asp.net/ajaxlibrary/Ajax%20Script%20Loader.ashx
http://www.asp.net/ajaxlibrary/HOW%20TO%20Combine%20Scripts%20using%20the%20Script%20Loader.ashx