An interesting breakdown of top cities for the jobs right now:
San Francisco (City) - 41
New York - 15
London - 13
Boston/Cambridge - 11
Palo Alto/Mountain View - 10
Seattle - 9
Chicago - 8
Los Angeles - 4
Philadelphia - 4
Toronto - 4
Berlin - 4
Amsterdam - 2
Ask HN: Who is Hiring? (November 2011)