The first and most important question I have relates to the WPML plug-in. I'm based in Japan and all services need to appear in English and Japanese at a minimum. While I am aware that you have many translations (excellent work!), I can't find any information on whether your plug-in works in multi-language sites using WPML. This is a very important consideration for me as we move towards deploying a new local service.
The second question relates to a site with many users contributing data. We are looking at building custom taxonomies, structuring their display and allowing registered users to add data via the Types, Views and CRED toolset. Is this something that plays nice with Maps Marker, or is there another way that users can add geo data without having to log-into the WordPress admin panel. This is an important consideration when you have something like a place listing. People might add some data about its address and perhaps services, and also want to be able to include a map marker.
Finally, while I understand that your plug-in can export data in various formats, it mainly seems to be focuses on allowing people to add markers. However, we are very interested in displaying segments of geo-data from OpenStreetMap en-masse for when people need it. For example, showing all the places of worship in a city, or viewing all the McDonalds. This data appears to be available in the OSM planet, but I would deeply appreciate if you could help us understand how it would be best connected with your plug-in.
I think what you have created looks great, and as long as we can accomplish the above, I believe it will be adopted on our end. I'm very interested in the pro-version and any expanded support options that you put out.