I found a couple articles regarding performance and scalability for ASP.NET, and ASP.NET with AJAX. I think these are a good read for anyone doing development with these tools.
Holy cow! I forgot to post the initial list of Ajax links! Here they are, and man are there a lot of um! I will be using thes for my research and will reference them in blog entries.
So far the only sources I’m investigating are Microsoft Atlas and Telerik r.a.d. Controls. Infragistics has also had Ajax components for a while. See notes below for ComponentOne as well.
I’m increasingly asked to build more sophisticated web interfaces which begin to approach the interactive capabilities of a thick client. Satisfying these requests is getting much more difficult.