Preview is STILL laggy with lights around lots of avatars. SL froze for 10+-second chunks at a time when I approache a group of, I dunno, maybe 5-10 users with lit high-prim attachments on.
Lights should also be settable/reconfigurable for multiple prims at a time. Gets annoying having to set/edit them for EACH prim...
Pentium D 820 (2.8GHz), 2GB PC4200 DDR2 RAM, GeForce 6600GT 128MB
64m draw distance, all LODs in the middle, full graphics settings