Ok,

Just in case anyone is interested... I talked to the cable ISP and it looks like for only and addition $10 a month you can double your allowable bandwidth. Not a bad deal considering they charge an additional $20 per giga without it. But I still haven't been able to track down how that much bandwidth could have been used in such a short time. Thanks for the suggestions of programs.. so far I haven't found anything too unusual. I still suspect someone is using my friends computer to store their warez, mp3, etc.

Tom