NASA's unmanned jet X43A, powered by an experimental scramjet engine, flew under its own power for 10 seconds off California coast and reached close to mach 10.  Awesome!

X43A is the small (12 feet long) black thingy
at the tip of the white booster rocket
hanging under the B-52.

X43A accelerating to scramjet speed

I couldn't find any image or video of X43A flying under scramjet power.  Maybe they are classified.

BTW, NASA's scramjet project is being phased out, thanks to Bush's Vision for Space Exploration initiative which aims to send humans to Mars.  *eyeroll*  Damn it.  I wish we had more say in where my tax money goes.