Hi oldbroker.
You are right; activecollab 1.0 seems to be just around the corner, and Ilija is probably going to deliver a great piece of software.
But there is concern in its community that the commercial focus the project is gaining might affect licensing and feature set. My feelings are that Ilija should be more open about the roadmap, and empower the community participation.
Anyway, all development is aimed at low coupling so reintegration, if ac 1.0 merits, should be easy.