I've finally finished version 0.2 of splittar. In addition to some bug fixes, I've added a few new features:

• Generate files with more consistent file sizes
• Keep multiple files open so that smaller files can be added to archives with a bit of room left
• Ability to tweak how splittar estimates how well a file will compress. This is a weighted average between the actual file size, and the file size multiplied by the current compression ratio