Here's how it works: Our upstream counts every bit of our traffic. Every seconds an average is taken. During a month's time, the top 5% (36 hours) of samples are thrown out. We are then billed on the highest sample, excluding the top 5%. In our case it is $400 per meg. Our connection is a 100Mbit port. If something went wrong we could get nailed with a huge bill. We have about 50 email acounts and a dozen low traffic web sites. Out 95th averages about 200Kbps = $80 / month. I am told that this is a common billing method. - Robert