I've also started http://projects.theforeman.org/projects/ofi/wiki/Implementation_Notes page at our wiki. BTW Redmine can be set to send notifications about all wiki modifications. It can be done on http://projects.theforeman.org/my/account page. Choose "For any event on the selected projects only..." and then check box OFI. If we decide to keep all the wikis with architecture description there uptodate It can be quite useful since every body will be notified about any design/architecture changes. Petr