The Tech - a technology museum across the street from the convention center in San Jose, California - is in SL now. They're going to try to build exhibits in SL and in the real museum - get SL and RL designers working together. They have a great space to exhibit spaces and lots of room for people to work on their projects. There's even a contest with a $5000L prize.
They have an IMAX theatre to show videos. They want to have mixed reality events (which I love of course)
Right now the exhibits are about music and dance - you can play a guitar, create art together. Fun times.