Grab it here. Contributed by Nik Henson. Haven't tried it myself, but he says it offers a very modest boost (5-6 FPS) at some points where the 32-bit build normally slows down. Let me know if it works.
Well, I think that's a wrap! Hopefully I can scrape together another release in a few weeks. Check the What's New page for WIP updates (don't expect anything this week though). I think I've spammed the MAMEWorld forum with this OT stuff enough :P