I'm a big Subaru fan and although I certainly don't love the styling on this one, it sounds like they've done a very good job of improving the breed. But the article that was posted hinted at, but failed to point out, the biggest change:
http://www.fast-autos.net/subaru/06subaruwrx.html
The regular WRX dumps the old 2.0 liter for the 2.5, albeit at lower boost pressures. Still, that gives it 3 extra hp and 18 ft-lbs of torque. Mmmm.... torque....