I dislike the DR jail idea - they're already detaining you in a boring place for the purpose of punishing your crimes. Execution is for the True Death - and for the high crimes, not just getting in a drunken fistfight at Kada's. While I think murder needs a harsher IC sentence (players are only given a few days' time in there for it in the recent cases I've heard of), and you're supposed to spawn randomly in the DR, aren't you? Shifting portals and all that jazz; it's just not done mechanics-wise yet? Or have the plans for that changed?
An official college sounds interesting, though. I mean, there's the Knowledge Seekers for an IC one, but a concentration of high-level trainers would be nice (Laanx knows it can be annoying enough to try to find your trainer in PS right now unless you know someone who knows where they are or access spoiler websites).