This time I'll get it done.
My first post here is rather slim on details, but I am reluctant to post much until I've got a more formalized plan. Essentially my plan is to create a web-based, multiplayer dungeon crawler with player character persistence and a menu and chat driven overworld. Dungeon crawling will be limited to small parties of five, though this may increase or decrease depending on how party size affects gameplay. I also intend dungeon crawling to be turn based, which should drastically simplify development relative to attempting to develop a reliable, real-time system using AJAX and HTML. I'm not getting real creative with the genre, which will be Tolkein-esque high fantasy.
So, there you have it.