I miss having my calendar appointments (not just reminders for appointments), a persistent display of information in a consistent manner/order -- what's displayed in IOS5 really is just notifications - easily/accidentally dismissed., previews (they worked fine for me 90% of the time). Weather/calendar/all other notifications always available on the lockscreen on a button press are nice.
It's a whole lot better than before IOS5, and sure looked like a surefire replacement for lockinfo during the presentation, but it's not quite there yet. If a JB is available for IOS5, I'll be JB-ing for lockinfo (geez, I feel like such a shill). I won't hold off on IOS5 to stay on 4 just for lockinfo though.
edit: oh, and status bar notifications as unobtrusive little icons