First of all, I managed to get auto-scheduling included in the 1.0 release, and it seems to work well. The scheduling takes into account weekends, and it should be easy to add in holidays and so on as well.
However, vacation time is not accounted for. That will come later.
I'm not sure when I'm going to be ready to release 1.0. A lot of projects are in flux here at work, and it's hard to tell how much time I'll be able to devote to project manager.
If anyone is able to help on development, I'll release it soon. However, you'll need to commit to helping out on upgrade scripts!
For now, you can get it off the 5.0 branch, not HEAD. But I'm not supporting upgrades yet -- it's just for checking out.