I'm Looking for a good project source samples for learning ASP.NET MVC 2. (Full project like CMS, Blog...anything that is well written in MVC2)
This blog by ScottGu is very nice.
http://weblogs.asp.net/scottgu/archive/2007/10/14/asp-net-mvc-framework.aspx
You might want to have a look at the ASP.NET MVC 2.0 Starter Site.
I'd check out the Orchard Project. It's a CMS with blog features.
It's in a quite early stage, but it has a very clear roadmap and many talented developers are working on this project.
Nerd Dinner is very good. The current release is MVC1, but it's in the progress of being upgraded to MVC2 and the code for it is already available.
Nerd dinner tutorial is really good for learning MVC even if it's based on MVC 1. Since MVC 2 is still fresh then you probably won't find any "full projects" based on this release for some time, however there are series devoted to MVC 2 on ScottGu's blog which you can apply as you go through Nerd dinner stuff.
The source code for the book ASP .NET MVC in Action, which is 99%-100% MVC 2 at this point, demonstrates a well written MVC 2 app.
I've been putting together a project to demonstrate MVC2 features for an upcoming talk I'm giving. It's a work in progress, but I've covered 80% of the good stuff.