Some very nice 3D recreations of Egyptian buildings and artifacts have been built and showcased in the Themiskyra land in Second Life (the user-led MMORPG). See a Flickr gallery of some of the objects at http://www.flickr.com/photos/pathfinderlinden/sets/72157594214266172/ or teleport straight to Themiskyra from http://slurl.com/secondlife/Themiskyra/72/241/35 (Second Life software required.)
There was some talk of a Roman theatre project moving their 3D buildings into SL at one point, but I’ve never seen it in there. Any news? There’s a lot of scope for this sort of thing.