Another problem might be the communication with people who cannot participate in the regular meetings that are part of the SCRUM methodology. At least the goals for the current sprint are now publicly communicated, but external contributors still miss a lot of what goes on in the daily meeting and cannot bring up issues there themselves.

This is *not* a call for meeting minutes or phone conferences – that would defeat the whole purpose of these brief, informal get-togethers, I suppose. I’m just mentioning it because it would indeed be interesting to find out how this can be combined with an open source project that has external contributors.