We Collaborate here:
We use Github Issues for all technical ticketing. Each "Repository" has a separate "issue" section. For example, see Ushahidi_web. We are investigating better ways to give Feedback/input for Community Members who are not technical.
We are #ushahidi on irc.freenode.net
We have a number of Community Skype channels: Developer Skype Chat, Mobile, Swift Public and Research Non-Tech Skype Chat
(contact ngelzy on skype to be added to these groups)