[DonbunEf7]

Well, why would they? Clones would be using relatively old technology. The current bleeding-edge research here is on more-structured, more-formal knowledge representation, stuff like FQL/AQL [0] which is open-source from the first day. Maybe Datomic's not sufficiently better than Pg or SQLite to motivate anybody.

[0] http://categoricaldata.net/fql.html

[augustl]

That looks very interesting! Do you have a recommended point of entry for a non-academic practitioner like myself? :)