Then our hosting provider not only sucks.. (no offense) but is stuck in the past.. about 85% of HP now offer unlimited monthly bandwidth.
ie: webhosting.com or media3.net
don't know how much space we have, or if we do CoLo or anything like that.. but if we aren't getting unlimited transfer/hits.. nowadays.. we're getting screwed.
I know personally when I set up a client for web hosting, I won't select the plan unless it has unlimited transfer and depending on company size or growth habits, unlimited emails and ftp's.
(THIS IS ALL PERSONAL OPINION, no disrespect to anyone or any company).