You can also get a baby-grape, see pictures on http://www.astro.umd.edu/~teuben/pics/japan/09/p70 90014.html which runs a good fraction of a TFlop, and will cost somewhere around 10k$.
I have some more pictures on http://www.astro.umd.edu/~teuben/pics/japan/08/ which shows the 1/4 size Grape6 running 32 Gflop. The final full version would cost about 1M$. Compare that to the AsciWhite at 12 Tflop for 100M$. Drawback of course is that the Grape only computes things similar to the gravitational N-body problem (also useful for pharmaceutical industries).
Btw, also spent some time in Akihabara on sunday, I guess we're deprived on the US east coast, the amount of DVD writers you can get here is amazing. Also very popular here seem to be all kinds of embedded units, e.g. the GPS in your car to not get lost in Tokyo!
There was an ABC news story earlier in the year on the GRAPE, but at the time it was running alpha's with their unix. They have now fully switched to linux, and this system has been running since July 5."