I GOT THIS:

As of 9/9/2006, your hosting account has accumulated 2,928,890.63 MB of data transfer. This means that the allowed 2000000 MB of monthly data transfer for POOLENET.COM has been exceeded by 928,890.63 MB.

Then they hit me for 1.49 per gig over. All this came in a 4 day period. My billing month started on the 4th.