There is also some Astronomy work - SkyServer which is part of the Sloan Digital Sky Survey, a project to make a map of a large part of the universe and make it accessible via the web and web services.  It currently pulls together (via webservices) 19 databases located throughout the world.  You can test it out at

They also have a subset of the database and code available at
so you can even play with it on your server/laptop.