I was starting to put together my content for the next presentation at the Perth .Net user group (www.perthdotnet.org), when I stumbled across Atlas (http://atlas.asp.net/Default.aspx?tabid=47). It is amazing how this team has simplified AJAX,and within minutes (well less than 30) I had a demo running, which consumes a webservice with each key press inside a text box, and returns the results.
I thought I would put the demo (http://www.softteq.com/demo/ajax) up to make explaining AJAX easier. If you check out the docs on the ATLAS site, you see all the code to make this happen.
Al