I'm pool mining. Is there a way to tell how much is going in and out of my router or at least the miner itself?
You basically have to look at your firewall/router to see the traffic. What I've found is that that for strattum / bitcoin, every 1 Th/s of mining equaled an average of 5.21 kbps inbound and 4.41 kbps outbound.
If it's s3, you can log into S3 web interface and it will tell you how much data it is transferring. Afterall, s3 controller is a router by iteself :-)