I mailed my application in on January 13th, received an email on January 30th that it was forwarded to the department for review and on March 10th I got confirmation that the application was complete and received by the department. Other than this I have heard nothing so I am right there with you.
Below is the only email I have received from them, I feel like they are all over the place!
"I am writing to inform you that we have forwarded your application to the graduate department of your intended major for a final review. Departments generally review applications after the program application deadline and make decisions within 4 to 6 weeks after the deadline date."