It allows the user to easily choose the location they want to insert (in microformat) from a Virtual Earth map and also configure how it is displayed (if at all on the post.
Recently I (with considerable help from Alexander Groß) added GeoRss support for dasBlog. The co-ordinates can be specified when adding a post via the web interface. This plugin is stage two of this support, stage three will be parsing the geo microformat when a post is added and using that to populate the GeoRss info.
The end goal being to allow the geo info to be entered when creating a post in Writer and having that info available in GeoRss format in the feed.
I started this plugin with the view to using Google Maps, however they require that you get an API key and that key is only valid for a particular web site / URL path. This foiled my plans to embed the map in a Windows Forms WebBrowser control (I did look at producing an html page that was served from my web site, and using it embedded in the WebBrowser – not scaleable and too much configuration for a normal user to do.
You can get the installer for it here InsertGeoFormatSetup.msi (325Kb).