dasBlog's editor does the best it can by using the Free Text Box control for article authoring. However it does have it's limitations. I generally find myself editing blog entries offline in TextPad and then saving the draft to a file. On occasions I might have two or three ideas on the boil and managing the drafts in dasBlog can be cumbersome. Enter Windows Live Writer....
Windows Live Writer is a FREE offline WYSIWYG authoring tool that can be used to author articles offline and then post them to your favourite blogging space. Live Writer supports multiple blogging API's such as Movable Type, Metablog, WordPress, Community Server and of course Live Spaces.
One of the really cool things is being able to preview how your article will look (in dasBlog anyway) before publishing it..and in offline mode too. Another cool feature is the plug-in SDK so you can extend Live Writer to publish custom content. So far there's Flickr, Tag and Current Listening to writer plug-ins on the Live Writer space.
I really like this and MS has kept it really simple as well.