Original hardcover release from Orbit US.
Orbit paperback release planned for a January 2010.
The hardcover design never did a lot for me as the type was a bit overwhelming, but it did give a more of a virtual feel with the coloring than the mass market. Yet I find the mass market cover more appealing. Eyes always seem to draw me in, especially when colored oddly.
Next up is Cory Doctorow's Makers:
Hardcover release from Tor US.
Hardcover release from HarperVoyager UK.
The image on the US release is quite interesting. but the hands down winner for me is the UK version. It is very original and makes me want to pick it up to breakout the individual pieces.