MSDN has an article on
using .NET to connect to blogs, either to read or to post articles. The
example shows how to create an Outlook add-in to read RSS feeds. This is for
the next version of .NET, so it requires Visual Studio 2005.
My.Blogs is a collection of sample code that will show you how you
can easily provide programmatic access to weblogs in the applications
you build. Full source code is provided along with Windows Forms,
ASP.NET 2.0 and a Visual Studio 2005 Tools for Office Outlook Add-In.
getting started article for more ideas on using My.Blogs.