That Onmimax/earthquake place is gone. I only went there once. Sort of "meh" to me, but fun for a tourist. Just across the street in the Performing Arts Center, though, they still do the northern lights slideshow, which can be kind of neat.

However, there is a newer (maybe built around 2000 or so) addition to the options in town: the Alaska Native Heritage Center out at Muldoon and the Glenn. It's spendy ($20 or so per person, last time I checked), but worth it for the visitor. It's actually run by a consortium of Native groups and will give you a better look at the way of life of the traditional peoples of Alaska. (More real, anyway, than the commercialized cruise-ship version.)