This thing is awesome! Price tag is $299, and it most definitely performs better than the $400 GTX 260, it even beats the GTX 280 on a few occasions (Bioshock, COD4, HL2), and this is only the 512MB card!
The memory works at a quad data rate of 900MHz x 4 = 3600MHZ, the core and maybe the shaders (we don't know yet) work at 750MHz. I looks quite good too.
I couldn't get the translator to work so you won't be able to read the text.