As of this post, the latest svn revision, r148, has pickling support which is working great on the testbed. I'm rather excited about it, as it's somewhat of a powerful and unique feature.
For those who can compile the library, check out the testbed. It works like your regular quicksave (F5)/quickload (F7) system. There's an additional test, test_pickle.py, that shows how easy it is to load a pickled world. As far as the code itself goes, there's still some commenting to be done, but it should be readable.