DBStore 0.3 has been released.
Postgres (psycopg and psycopg2) support has been added.
Instead of just a decorator for each database specific
store, there is now also a store generator that you can
use to make your own decorator, which is probably more of
a realistic use case. Small changes in the implementation
of the storage module were made to ensure interop with
the postgres APIs. There is now a pickle_protocol
attribute that defaults to 0. See the pickle docs for details,
if you have massive session data.
[Update: I forgot to mention that dbstore is now LGPL.]
See the dbstore page for more info.