Thanks to Slashdot for the story, the University of Queensland laser diagnostics dept has a page where they test Star Trek's Enterprise (not TNG) to Mach 5 in a wind tunnel. You can see how it did here. For StarTrek fans we tested the USS Enterprise in our super-orbital expansion tube - X2. A scale model was placed in the test section and the facility used to generate a high speed gas flow of around 6.6 km/s. This was passed over the Enterprise for a duration of approximately 100 microseconds.