[jarofgreen]

Contributor Agreement is absolutely relevant. If there is any chance that the project will accept patches from random people then release those patches as part of the core code base under a license .... you need a contributors agreement.

Given that OpenCall is Open Source, this is very possible.

Good point re diff between on GPL/BSD and AGPL. Tho if I may add, AGPL will only state that in writing. A bad company may break that, and then it's up to how willing you are to get legal on them to enforce the AGPL. Some people may be unwilling to do this, so this may play into the choice of license you go for.