Scott Guthrie's
blog has some details about the release. I'm a bit behind on this one, but some of the highlights I keyed in on:
ASP.NET AJAX and JavaScript Support
.NET
3.5 has ASP.NET AJAX built-in (no separate download required). In
addition to including all of the features in ASP.NET AJAX 1.0, ASP.NET
3.5 also now includes richer support for UpdatePanels integrating with
WebParts, ASP.NET AJAX integration with controls like <asp:menu>
and <asp:treeview>, WCF support for JSON, and many other AJAX
improvements.
VS
2008 and Visual Web Developer 2008 also now have great support for
integrating JavaScript and AJAX into your applications. You can learn
more about this from my blog posts here:
My plan today is to see if I can't develop a basic Silverlight 1.1 application. I have this idea for a rich interactive display on top of
XPlanner (everyone's favorite project tracking tool at my office) called
TaskBored that would give you a view of open stories and the tasks associated with them as if it were all sticky notes. The desire for this view came out of our planning process, and while we've pretty much left this technique behind as impractical the view of the work ahead it produces is useful.