I recently picked up a sony a7s camera. It is currently the best camera for shooting in low light.
Here are some test shots I've done with it. This is my photographer friend Jessica Lea Halas at 52,000 ISO last night. I was struggling to find somewhere dark enough to test out high ISO. Lit by her cellphone only. I can't wait to push this thing to it's limits. The only problem is finding areas dark enough.