skitter case study: asia-pacific 

    'Measurements of Internet topology 
    in the Asia-Pacific Region'
    http://www.caida.org/papers/

9 sources, about 2k dsts in asia pac
topology, performance
country peering, third party transit
stability: IP vs AS level
60-70% of IP paths from 7 monitors are stable during day 
closer to 40% for KR, NZ boxes
90% of AS paths stable 
little correlation between RTT & distance
even less between RTT & hop count