ASP.NET MVC Codeplex Preview 5
ASP.NET MVC Codeplex preview 5 went live last night. Available here. I haven't had a dig into it yet to have (just downloading now), but according to the release notes, some of the highlights include:
More support for partial view rendering
Moving AJAX support into its own namespace (System.Web.Mvc.Ajax) to make it easier to swap it out and replace it with your own choice, such as jQuery.
Various other tweaks and improvements particularly to helper methods.
The source code apparently follows shortly!