I���m happy to answer any questions about Simple Persistence. It is a nice framework around (potentially any) serializer. It���s meant to be pluggable but currently uses Fuel out of the box. You just tell it what classes to persist and then create two methods per class to handle materialization/serialization.
For the record, Ramon Leon created it in a blog post. I just ported it to Pharo and have been maintaining it.
The stated reason he created it is that most solutions are complete overkill for 99% of projects that will never ���become the next google���. It���s pretty basic, but at least two steps more sophisticated than simply saving the image because it keeps old versions and is easily reloadable into another image.
That said, I���ve been using it almost exclusively for my personal projects and have yet to grow out of it.