The Soviet Shuttle (I believe called the Snowball) did have the distinction of flying an unmanned, completely computer controlled mission - something considered impossible for Nasa to achieve at the time. Quite impressive!
Other Soviet lookalike copies include something that looks very similar to the US B1 bomber.
That said, a lot of the more advanced aircraft developed from the 50s onwards were based on concept designs by German engineers from the second world war so the similarities might not all be due to spying.
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Dr. Zhivago:
I seem to remember reading somewhere a couple of years ago that Boeing had got together with the Russians to draw on their supersonic experience. Hadn't heard about the $11 mln. e-bay sale, but anything is possible in Russia. After all, their version of the space shuttle (also a lookalike copy) was grounded after its maiden flight (it lost a lot of tiles on re-entry, and was prohibitively expensive to operate), and is now an attraction in Gorky Park (the actual spacecraft is set up as a ride!).</font>