Local ASP.NET guru, Milan Negovan, has posted another in his fine series of "cheat sheets" on the Microsoft AJAX Library. This set highlights the client-side life cycle events that occur in the MS AJAX library when making an asynchronous call back to the server.
You can find the "ASP.NET AJAX Client Life-Cycle Events" cheat sheet here.
Milan's "ASP.NET Resources" site is a great place to pick up lots of ASP.NET tips and tricks. You can read many of his blog posts and articles there that highlight how to support web standards in your ASP.NET applications.
Thank you for your support, Peter!