We are writing code for Zerolith faster than we can pack it, do great testing, then ship the open source.
That's because we have a lot of our clients using it now, and they need lots of new features. So it's having a growth spurt.
There is also a new zl.css coming.
We are also working on a tool for managing large PHP applications we're tentatively calling ZeroAdmin.
I'm sorry but the current status is "it's done when it's done". However, the next release is going to be enormous.