Excellent article.. I was wondering if you could help me understand why Franz's Allegrograph or Aduna's Sesame were not sufficient for you needs. Have you had the opportunity to perform any benchmarks against these graph DB's?
Tried Sesame, it was one of the graph DBs that I mentioned not being up to snuff. Also looked at Franz's DB, but based on the benchmarks they publish on their site (they've also imported a smaller Wikipedia dumb) it looked like it's about 5x slower than ours.