Google has announced nine more cities that have street view enabled in Google Maps:

Now you can check out 360-degree views of Chicago, Pittsburgh, Philadelphia, Phoenix, Portland and Tucson. As an added bonus, the images in Phoenix, Tucson and parts of Chicago are all in high resolution.
But wait! There’s more. Ever wish you could pan up to the very top of a 50-story skyscraper using Street View? Well, prepare yourself for some serious sightseeing; we’ve introduced the ability to pan up in most new cities.

That’s pretty awesome, so start being nosy again!

Update

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Chase Tower in Chicago has got some serious lean to it!