I've started a very basic (work in progress) entry on the netaddr wiki to track various aspects of this discussion that might not be in a format suitable for publishing to the list or are too lengthy. It will also allow my ascii art diagrams to render correctly ;-) http://code.google.com/p/netaddr/wiki/PEP3144 I will be updating it as free time become available to me over the coming days. Feel free to make comments on the wiki page itself if you want me to make any changes. Duncan McGreggor should be able to make changes if I am not available for whatever reason :- If anyone has suggestions for a better place to put this, please shout (but not too loudly please Peter M. ;-) Thanks, Dave M. PS - Can't wait for Google Wave which would make this kind of thing so much easier ;-)