Need to be able to add Wordpress blog post to a map upon post publication

Hi,

I’m looking for a map plugin for Wordpress that allows me to add a blog post to the map. This needs to be done at the point of publishing the post, not after the fact. The reason for this is because I want to publish a blog post via email, so I’d need to be able to add the lon/lat co-ords as a special field within the post content of the email.

Any pointers?