I've dropped in on a couple of these and found them quite worthwhile. One thing I did notice: People were using webcams but not voicecomm, even though tinychat supports it. I'm not sure if that's an intentional norm or not. Given the brevity of the breaks it may not matter much.

As far as looking for developers...I have no javascript experience (I do Python and C mostly), but I'm a fairly competent programmer and I would be willing to step up if no one else better-qualified does. A good programmer can pick up any language they need to. I'll mail you with some evidence that I don't entirely suck at this.

Also, I'm a sysadmin IRL and have a couple servers lying around. If we go with OpenMeetings and have need of a server, that may be of use.