The MEMS Exchange released Durus 3.2 today.
http://www.mems-exchange.org/software/durus/

Here are the changelog notes from this release:

     * Add 5 iteration methods to BTree.
       __reversed__() for reverse iteration of keys.
       items_backward() for reverse iteration of items.
       items_from() for iterations starting at a given key.
       items_backward_from() for reverse iterations from a given key.
       items_range() for iterations of items with keys in a given range.

     * Add __nonzero__ and setdefault methods to BTree

     * Change the name of BTree's get_count method to __len__.

     * Add setuptools support (when installed) to setup.py.

     * Remove convert_zodb.py script, rather than fix/maintain it.