I interviewed ten weeks ago (1/10 Twin Cities) and hadn't heard back yet, so I called the office today. I was notified I should have received an email several weeks ago. The woman I talked to was nice and let me know she'd resend the email, but I still haven't received anything (even in spam). I have received emails from them with no problems until now, so I know they have the correct email address for me on file.
Suffice it to say, you never know when technology will fail. If you haven't heard back yet and think you should have, you might as well give a call now. I am glad to at least have the closure of knowing that I am waiting for an email -- and not a call. Best of luck to those still waiting!