Hi,
There is new release. It has many features from 2.0, I think it is fairly usable. Release notes:
http://www.mapdb.org/changelog/#milestone-5-released-2016-04-14
There is also short blog post for those migrating from 2.0 and 1.0:
http://www.mapdb.org/news/migrating_to_30/
Regards,
Jan Kotek