Hi,
and welcome to the ASP.NET forums.
.Text was one of the first, as I recall it, blog engines for .NET and got integrated in Community Server (upon which these forums also run).
I don't know if the code can be found or that it got upgraded for 2.0 as I didn't follow .Text anymore. The version that's in Community Server 2007 is for 2.0.
Other blog engines, built with .NET, are:
Subversion, dasBlog, blogengine.NET. Some of these use a database to store the data, while others use XML.
Also, Microsoft created a free tool to easily create blog posts with it: Windows Live Writer. I like it.
Grz, Kris.