The University of Michigan has set up a website where you can look at scans of fossils from their collection in 3D, you can spin them around and measure them and everything!
This is the homepage https://umorf.ummp.lsa.umich.edu/wp/
And here's a spinning mastodon http://umorf.ummp.lsa.umich.edu/wp/wp-content/3d/bonePicker.html?name=Buesching
There are quite a few different organisations doing similar sorts of things, for example the British Geological Survey are scanning their collection: http://digitisation.jiscinvolve.org/wp/2011/12/16/scanning-fossils-in-3d-at-the-british-geological-survey/
This will hopefully be a really useful tool for researchers who want to identify their own fossils, or check out what the museum has in it's collection before going to visit.
Also its just really cool.
Several recent technical advances have enabled the museum to place hundreds of the scanned images on a new website called the University of Michigan Online Repository of Fossils. Initially intended as a tool to help field paleontologists identify fossils, the powerful new resource is expected to have wide appeal to students and the general public, as well