I have seen several posts/threads on this subject both here on Comcast's forums and elsewhere.
Is the montitoring software forthcoming? I do not (and will not) run McAffee-based software on my Macs, and the office computer is locked from installing anything. I cannot install any firmware-based monitoring tools on the FVG318 router, either.
It's been almost a year since it was announced. I don't think that they currently have the capability to do an accurate measurement. If they did, any programmer worth his salt could have developed an online application in a month to display the data.