CFFI 0.8 for CPython (2.6-3.x) has been released.
Quick download: pip install cffi --upgrade
What's new: a number of small fixes;
ffi.getwinerror(); integrated support for C99 variable-sized structures; multi-thread safety.
Update: CFFI 0.8.1, with fixes on Python 3 on OS/X, and some FreeBSD fixes (thanks Tobias).