I would like to say that the fan openings on the top, side and bottom are 140mm (with support for 120 mm). If not, Fractal Design must have changed the design from the Swedish version. Didn't get any dampening material for the bottom fan opening, bastards.
I've had the Define R2 since the Swedish release in October -09. Very happy with mine, some minor kinks that still hasn't been worked out by Fractal Design, but overall a great chassis. It swallows my Thermalright IFX-14 with 99 % ease; the heatpipes on the top touches the dampening material, no worries though.