Chicago might be gentrifying, but that doesn't mean a wrong turn won't end with your lifeless body inspiring a plot for a Law & Order episode (which you can only pray won't be Special Victims Unit). Check out what's bad in every 'hood, with SpotCrime.com
A Baltimore-based watchdog group dedicated to cataloging urban mayhem, SC presents fun-to-read maps of crime data, 90% of which comes from police sources, and 10% from questionable local news sources, e.g., blogs, and Ronnie Woo Woo. The scary's visible from three to 24 hours after the crime's reported and filterable by date range, time of day, and type (shootings, assault, vandalism, etc), or you can select "all" to see when the Bengals are in town. Incidents are marked with sometimes amusingly appropriate icons, including everything from black-hooded heads (burglary), to flames (arson), to scampering man with moneybags (robbery); mouse over to see brief info or click for details on crimes of tenacity ("offender entered by breaking a window in a door, then had to break through several more doors to get at the room with the money") and good old-fashioned chutzpah ("five feet tall...woman robbed a bank")
SC just added an iPhone app, so you can check recent horrors on the go -- but be careful, because you're probably standing right on the spot of a recent rash of iPhone jackings.