FDB release 0.9.9 (a.k.a. almost final) is out: 
http://pypi.python.org/pypi/fdb   New Features: 
 Other changes: 
     - Cursor.execute() returns Self, so it could be used as iterator.
- Reading output from Services now uses more efficient method to get data from server.
 Bugs Fixed: 
     - Fix: precision_cache in Connection works as intended.
 Full Documentation is 
here  (or in the docs folder in the tar.gz).