I am currently developing an Ajax enabled application and would like to add browser history functionality to it.  My life would be so much easier if I could use the history functionality build into the 3.5 extensions preview script manager, but I can't.  Do to clients, internal politicking, and so on the latest version of the frame work I can use is 3.0 with AJAX.NET 1.0.  Does anyone know anyone know a good way to implement the same browser history functionality given my limitations?  It there a 3rd party control that anyone is aware of?  The only one I know of (but I haven't looked into it yet) is the Yahoo YUI history manager.

Thanks for any advice...