Assuming this list is incomplete and out of date, we should bring this up to speed. Are there other related docs scattered about?
Amazingly I think OA2 will provide a platform that will work for the DrupalKata (at least for the short/medium term)... as the goals/features are almost identical to Snowball (think of Kata as Snowball for Drupal), it can serve as a proof of concept. Hell... maybe it'll work so well and we'll just clone the site for Snowball!
