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October 20 brought a major update to ASP.NET AJAX - formerly known as "ATLAS". New bits were released, named "Microsoft ASP.NET AJAX 1.0 Beta".

So, to get started, remove the previous ATLAS CTPs:

1. First, uninstall all old ATLAS CTPs via "Add/Remove Programs" in control panel.
2. Make sure, all ATLAS-related files are removed from the following folders. In my case, I needed to remove them manually.
1. [my documents]\Visual Studio 2005\Templates\ItemTemplates\Visual Basic
2. [my documents]\Visual Studio 2005\Templates\ItemTemplates\Visual C#
3. [my documents]\Visual Studio 2005\Templates\ProjectTemplates\Visual Web Developer\CSharp
4. [my documents]\Visual Studio 2005\Templates\ProjectTemplates\Visual Web Developer\VisualBasic

Now it's time to install the new bits:

1. Download and install the Microsoft ASP.NET AJAX v1.0 Beta Core
2. Add the Microsoft ASP.NET AJAX CTP Beta for additional functionality as provided in earlier AJAX CTPs
3. Add the ASP.NET AJAX Control Toolkit from CodePlex.
   1. Untip the AppControlToolkit folder (I put it "c:\program files\microsoft asp.net\" alongside with the rest of the AJAX bits).
   2. Open the solution file and build it.
   3. This will create the file "~\AjaxControlToolkit\bin\Debug\AjaxControlToolkit.dll" that you can add to the Visual Studio Toolbox to add the sample extender-controls that come along with the toolkit.
   4. Run "~\AjaxControlToolkit\AjaxControlExtender\AjaxControlExtender.msi" to add the control extender templates to Visual Studio 2005.
4. Add the ASP.NET AJAX Sample Applications.

If you used the ATLAS CTP, you may want to have a look at the Migration Guide from CTP to tne new Beta. To view the changes in detail, have a look at the whitepaper: Changes between the ASP.NET AJAX (���Atlas���) CTP and the v1.0 Beta Release.

Also, very nice, there is now a Microsoft AJAX Library Beta for ASP.NET AJAX development on non-Windows systems. This package contains the complete set of client JavaScript components that are included as part of the full ASP.NET AJAX Beta installation. You may use and modify these scripts in your own applications.