I'm late to the party, but I just couldn't help throw a few more thoughts into here.
Q: On a PenTest team, what is the best way to collaborate what you have found? I pentest and I have found that communication break down is one of the biggest problems within the PT team social context.
.....
#3 P0wned list. Mae a secured Wiki, have a shared doc.. or use collaboration frameworks to take notes for juicy intel and info. Review this list with the whole team daily for large projects and every half day for smaller gigs.
For this function, I'd suggest checking out Dradis.
http://dradis.nomejortu.com/It's a work in progress, but at
Foreground we've already started testing it and we're thinking about putting it in production.
#4 Leverage traditional PM skills
Since traditional pen-tests aren't highly complex projects, you don't need a full-scale PM. Here's where a student intern can really help out - I'm a big fan of finding someone in a local college who is looking to become a project manager... they can learn to PM, track data, track progress, etc. And you get a resource appropriate for the level required.
Depends on the project, of course.