In case you've been looking for a decent .Text blogging tool for the
desktop, you should check PostXING.

It's a WYSIWYG editor tool that outputs decent HTML (at least
tags are lowercase, etc.), and allows you to edit previous
posts, unlike "IMHO Instant Blogger" which was my previous
choice. It includes built-in syntax high-lighting for C#, VB.Net, JScript
and XML.
Some of its other features include:
- customizable CSS stylesheet for the preview function,
- a crosspost function to publish the post to several blogs at once,
- an Upload function to a configurable FTP server, which allows
you to automatically insert a link to the file on your post
or insert it as an image.
- extensible by means of plugins and IBlogExtensions
- and WMP plugin integration.
Version 2 is currently in alpha
mode, and you can find recent news about the development in the author's blog, or the brand new PostXING's website.