Finally, I got time to address some improvments of PEnGUIn Encoder. This new edition added two-pass encoding support for x264. Users can activate it from the Preferences' setting.
Btw, the Broken DivX Encoding is fixed too. Just noticed that problem days ago. Maybe fewer and fewer users use DivX encoding as Intel Inside Mac is getting more and more popular.
So please take a look of the recent update in the download section of right column.