Riverfish
Riverfish is a python library for creating iterable, seekable sparse lists in a Memcached 1.4 protocol key/value store.It is currently not ready for use, but does support forwards and backwards iteration and insertion. The in-kv storage format is still in flux and it is highly recommended to not put anything you care about in Riverfish yet.
SVN
svn://svn.truct.org/riverfish