The OSGi bundle MANIFEST.MF file looks incorrect:

Bundle-Name: MongoDB
Bundle-SymbolicName: com.mongodb
Bundle-Version: 2.1.0
Export-Package: com.mongodb, com.mongodb.io, com.mongodb.util, com.mon
godb.gridfs, org.bson, org.bson.util, org.bson.types, org.bson.io

Shouldn't that be 2.4.0?

Please also note that (odd enough) the bundle version number is not used as a default version for exported packages that do not explicitely specify an export version. As a consequence one can not import these packages with a well-defined version range. Both issues require me to repackage this bundle, which also creates a potential for deployment duplication.

Say, do you plan to provide an Equinox p2 repository for your OSGi bundles?