I tell you what, browsing around the ramps at Edwards AFB in Google satellite view today has been the most interesting thing I've done all week. Look! I found one of the old F16XL test planes just collecting dust in a back corner!
I wonder what those two things on the other side of the ramp are? They look familiar but I can't put my finger on it.
If you go down to the South Base you can see what looks to be one of NASA's Canberras and this Rutan-esque oddity I'm trying to identify.
EDIT: Putting on my google-fu, I searched lists of X-planes and came up with the Orbital Sciences X-34. Then I did an image search on "tandem wing" and found the Scaled Composites ATTT.
.