I agree with different parts of both Bob and Pom. I *really* like the idea of a single-unit, high-quality lens, high-function point-and-shoot; anybody who is interested in street photography would.
This camera is getting there...except that it's way too big and too heavy. For the weight and size, you'd be better off with a Rebel. To appreciate it, you have to look at the size in all three dimensions -- it's 5.5 inches by 6.6 inches by 3.8 inches -- in other words, it's almost a cube, and it can't be broken down from that cube shape. You couldn't really carry it comfortably in a briefcase; you're back to a camera case. You could more easily carry an XT, with the lens detached.
Also, with a camera this large, you're putting a big noticable blob up to your face. Again, might well be an XT.
However, I'm sure some competitor -- Canon, possibly Nikon -- will cut the size down. One of the nice things about the Nikon cameras that twist open is that the form factor for carrying the camera is very flat, until you're actually shooting...
Anyway, I've said it before, and I'll probably say it again: small (700 grams with lens), flat, high-quality lens, 8mp+ sensor, wide to short-telephoto (this Sony lens would be fine, if it would fit in a smaller camera), vibration reduction, optical viewfinder, back-mounted twist LCD screen.
If I don't get it soon, I may have to fly over to Japan and kick some ass.