We've officially released ASP.NET 3.5 today, you can get it as part of .NET Framework 3.5 from here. This download includes SP1 for both .NET Framework 2.0 and 3.0 as well.
So what's new in 3.5?
- The AJAX Extensions are now a core part of the product. You won't need to install the AJAX Extensions separately to get ScriptManager, UpdatePanel, etc.
- We've also fixed a lot of the issues submitted via Microsoft Connect in 2.0 SP1
There's a ton of great videos to get you started with the new 3.5 features here.
Alongside this release, is a new Visual Web Developer 2008 release that you can get here.
Finally, we've updated the standalone Script Library download. If you move to using 3.5, and you need the standalone scripts as well, you can get them here.
Soma has more details about the larger Visual Studio 2008 / .NET Framework 3.5 release.
(this must explain why i haven't blogged in months, right? :))