A push in the right direction please?

I would like to have two listboxes filled with sorting criteria, and based upon the two selections in the listbox utilize some ajax functionality to update a gridview on the same page on the fly without any postback. The gridview holds a bunch of printer information with multiple manufacturers. Based upon the manufacturer selected in the list box will cause the gridview sort out the matching values and display the gridview contents without the need for a postback. Keep in mind though that I will be using two listboxes which will determine two search criteria the gridview will utilize. Is it possible to have this done with the current ajax control toolkit? If so does anyone know of any good articles to read that will "push me in the right direction"? Thanks for the help!.

http://msdn2.microsoft.com/en-us/library/aa581792.aspx

Really, the only thing you'd need the AJAX toolkit for would be to wrap the two list boxes and the gridview in an update panel (or just wrap the gridview in an update panel and set the list boxes as triggers) to hide the postback.