It was a straight move from RC to RTM and I have managed to have it online after deploying it to staging, doing some tests and then deployed it Production, thanks to Web Deployment Projects.

Here you can see an ASP.NET 2 Webpart on Tech Head Brothers using ASP.NET AJAX 1 to browse all news of the site on the home page:

And my personal tab control (now there is one in the toolkit) using ASP.NET AJAX 1 to display articles, tips, and contact of an author:

Update: btw the RTM solved the issue I had with ASP.NET Ajax RC and Google Adsense