Folks, I've been playing around with inter-backbone latency measurements using an N^2 matrix of Keynote agents. The results were interesting enough that I've put up a website that shows TCPOpen latency numbers (last hour and last 24 hours) for seven US backbones. Have a look at: http://internetpulse.net/ and let me know your thoughts. Please review the "About this site" link at the bottom of the main page for details on measurements and methodology. Note especially that these are *not* web measurements. The values are the number of mS required to establish a TCP connection. I'm especially interested in your opinions on the thresholds and the use of geometric means in the calculations. Please send comments to me directly, as there is no need to clog up the NANOG list. I'll summarize after a few days if there's interest. --Lloyd