ongoing/future

continue building infrastructure 
sources
destination lists
dynamically discover topology, b/w
correlation 
among sources
with perf, topology 
identify critical pieces of infrastructure
continue w metrics and analysis 
`center', `core', `close'
(optimize dist. server architectures)
filter new root locations?
determination of connectivity metrics
persistence of paths
metrics for `change'
better GLS support
model of the Internet (no, really)
graphing/layout techniques....