I’ve just published a new page on the wiki : Developers guidelines. It will contains all the “instructions” for those who want to help us as developers.
At the moment we are working on definying what will be developed during phpCollab3 next release. I’ll be in touch with you as soon as this plannig is over and I’ll wrote here all the details. If you have any question just write a comment or send an email to phpcollab [at] ideato.it
See you soon!