Fuji X-Pro 1, Olympus E-PM1 size comparison
Size wise, Fuji X-Pro 1 falls between my Canon 5D Mark II, and Olympus E-PM1.
The Olympus is almost exactly the SAME size as Sony HX9v, a point and shoot camera. The difference is that Sony's pocketable due to its retracted lens whereas Olympus, even with the small Panny 14mm f/2.5 lens will not fit in a jean pocket.
If memory serves me right, the X-Pro 1 size is similar to M8. That means, I will still keep a smaller E-PM1 and will not be terribly tempted to buy the upcoming Olympus OM-D E5.