Just thought I'd announce this here as well, but I've released my first WordPress plugin. It's called Travelog, and basically is a central interface/database for keeping track of the places that you visit/post from. It allows you to enter locations (with addresses, coordinates, name, description, dates visited, category etc.) which are then stored in WordPress. You can quickly associate your posts with a location, and - using the template functions - have information about the location appear with the post. Travelog can provide direct links to online maps of your locations (using GoogleMaps, Mapquest or a few others) so your visitors can quickly and easily figure out where you are! You can even use Travelog's inline tag to link text in your posts to a map of any location in your Travelog. The admin interface is flexible and allows you to quickly view/sort the locations in your Travelog, and edit any information about them. Further, you can choose to have a GoogleMap of the location embedded in the location editor, which you can use to preview the map of the area, and or even click on a point on the map and have the location coordinates set to that point.
There's still more stuff I'd like to add (much more interaction & embedding of GoogleMaps for all kinds of cool features, visitor-viewable list of where you've been etc.), and if you have any ideas of things you like to see added or modified, I'd love to hear about them.
To download the plugin (or read more about it) go to the plugin homepage. Hope you like it!