Sardine is the development version of Maemo distribution. To keep PyMaemo ready to the future of Maemo its necessary to use this bleeding edge distribution. At moment I'm fixing some issues related to PyHildon and PyGTK. Source tree available at:
Tip: I've had some problems with theme inside Sardine. To solve this just use the plankton theme as default. I did a backup of '/usr/share/themes/default' and 'cp -r plankton default'.