4 more hours of work got us a crude PvP system for my browser-based Ultima 7 Online. Little buggy and needs better visual feedback, but you can see it starting to take shape. It can support 2000+ concurrent clients (although probably not all standing in one place). Quests, dungeon instances, leveling, groups, and character vanity all on the way. One thing I did scrap: 8-direction facing turned out to be wildly complex, so we're sticking with the original 4-direction for now.