E. 13th St and 3rd Ave, Manhattan.
Here are a bunch more pictures via Flickr (thanks NYCviaRachel)
Update: Apparently the situation is still unstable (a piece of the crane is still dangling)– Tim Minton at WNBC is getting pushed out of the area by the FDNY live on Channel 4 right now. Latest update says that the people in the cab weren’t seriously injured (amazing)– but they’re being taken to the hospital for examination. Minton points out that this is the third construction accident this week. Helicopter shots are showing 3rd Ave shut down 12th-14th, but traffic is moving east-west on 14th.