Yes, there is such thing as transparent aluminum.http://www.af.mil/news/story.asp?id=123012131
I can think of a few other applications: safety glasses, eyeglasses, aircraft windshields, spacecraft windshields, fishtanks (like duh!), drinking glasses, CRTs, LCD panels, basketball goal backboards, and ice hockey screens.
I'm just waiting on the warp drive. [ Come on, Stephen Hawking. Get on it already! ]