Hi Ian, compliment! The plugin is great and work just fine!
I've few of question that can be useful for others too:
1)Can I associate a marker to each user, the best would be to the relative avatar.
2)Can I list the placemark's categories below the map as checkboxes and when selected will call the relative posts?
3)I tried to insert into my theme single.php the map code but the system suggest me to create a filter first, can you indicate me which the filter is?
4)How can I show the permalink, click and go, into the relative post for each marks?