I saw Jack in my talk at The Ajax Experience conference yesterday and was happy to see that he wrote it up for TheServerSide.net

Abrams on ASP.NET AJAX controls and components

I think Jack is picking up on a good point here about AJAX apps having both a client and server sides of AJAX apps… I predict that the next phase of AJAX frameworks will be deeper integration with server side programming models… much the way ASP.NET and the Microsoft AJAX Library work together.