[tophercyll]

We're experimenting with this technique in our peer-to-peer software. Unfortunately we probably won't have data on what percentage of the time it works for a few weeks.

Provided everything goes okay, I'll try to post our data as a follow up.

[huhtenberg]

You should make a test version of your p2p client and ask here (and, say, on Reddit and p2p-hackers list) to help test it. You will get a few hundred sample points in a matter of hours.

[gritzko]

Sorry for being lazy. Does it need root rights to forge ICMP?

[dotBen]

This sounds like an interesting project, do let us know!