How are you implementing the pagination of forums/threads? I dabbled a little bit with datomic last year and from what I remember, pagination of result sets was not built into the api.
Yeah, Datomic returns unordered data. I use a transactor function to bump the :post/idx on post insertion. On retrieval, I naively sort by :post/idx and use `drop` (offset) and `take` (limit).
When I asked in #datomic on Freenode a while back, support for ordered data was on the roadmap.
