Movement Maps Showoff
ArcEmu has movement maps implemented, it's just that it is not enabled by default and no extractor is available.
Basically by enabling movement maps and finding an extractor, we were able to activate them. It took 8 hours to process mmaps on a 8 core 12GB RAM dedicated server (though admittedly 15% of CPU was always in use by another process). It came out at ~1.6GB.
Enjoy the amazing wonders of movement maps. Perfect movement and collision.