SiPPF is now a SourceForge.net project
Yesterday I registered SiPPF as a project at SourceForge.net and it was accepted :)
In short: SiPPF - Simple PHP5 Persistency Framework - is a small and easy to use persistency framework for PHP5, which doesn't require you to adapt special design patterns for your entities. It will be used in Nucleus Boron, the next generation Nucleus.
Currently it's in a pre-alpha stage so i don't have much more information...