So, seeing as how I've been using git for versioning anyhow, I've moved overobuntu over to gitorious. You can get your copy of overobuntu by issuing the following command in your terminal:
git clone git://gitorious.org/overobuntu/overobuntu_builder.git
This contains the latest version of Overobuntu, 0.91.1, which has some neat new features including:
* proper Partition backup
* Automatic card formatting
* Several bug fixes.