Patches for The Sims 2: University and The Sims 2: Nightlife patches are out at the official site. They fix various bug errors with the games. If you only have Univeristy, download just the University patch. If you have University and Nightlife or just Nightlife without University, download the Nightlife patch only.
I've organized all the posts thus far into the Community Memories page. Posts are organized by LJ username for Sim!stories and updates, while custom content (skins, objects, make-up, etc.) for The Sims and The Sims 2 are under Downloads.