Moodyz
To those who got admitted.. do we have to accept the offer in order to get the admittance package, or will it be sent to us with no action on our part?
Congratulations, Moodyz!!

From what I can tell, accepting the offer online is the online version of mailing in the "confirmation card" with the deposit. The admit package should come in the mail, regardless of your decision to attend the school.
EDIT: R1 Acceptees -- congrats, everyone! And, based on last year's thread, if you're notified of $$, you'll get a call from adcom in the next 2 weeks. Last year, calls even started the day after decisions went out. Good luck, but don't be too disappointed if that 919 area code is just your interviewer calling to congratulate you