We have released a new Leaflet Plugin for Omeka, "Carta".
The plugin is available via GitHub at https://github.com/AcuGIS/Carta
We decided to fork from the previous Leaflet plugin as Carta has a large number of changes.
Most importantly; fields from Items, Collections, and Exhibitions can now be imported into your maps.
Multiple fields can be imported as well.
We've also added 5 default map groups that are pre-loaded with SSL maps.
There has also been some clean up of the code as suggested by Patrick after the first release.
We hope the plugin will prove useful to Omeka users.
If you have any questions, please post on the dev list or email me directly.