Richard has added a handy little feature to Multimap. By creating a category for blogs (along with hotels, restaurants, etc.) you can now link a blog to an address in the Multimap database.
Just last week I was updating my contact page and I decided to make the postcode a hyperlink through to Multimap. The timing of the new blog mapping feature is fortuitous.
Now I’ve expanded on the link by adding "&cat=blog&title=Adactio"… or should I say "&cat=blog&title=Adactio". Don’t forget to encode those ampersands if you want your pages to validate.