I’ve been doing some work for a friend of mine, mostly writing WordPress plugins, also writing a theme or two.
Recently I created a plugin for mapping your blog entries to some geo-coordinates. I had found a few other plugins out in the wild that allowed people to enter the coordinates themselves, but I really wanted something simple enough for the blog editor to only be aware of a town or street address to place the entry.
If this interests you at all, take a look at the project source code page, also I have a small video of using the plugin (ogg)
Next thing to finish is exporting the georss in the blog RSS such that a reader could map then entry automatically.