I'm still in the process of getting the CVS tree installed. Soon thereafter I will probably be releasing version 0.3.4, hopefully the last version before 1.0.0. The major change from 0.3.3 is that all the various MySQL constants are no longer directly defined within _mysql. Instead, they are in the _mysql_const package, which is a pure Python package. They are imported into _mysql at load time, so operationally there should be no difference.