I just recently completed an nmap of the routed portions:
http://kb9mwr.ampr.org/public/nmap/030516routed.txt
http://kb9mwr.ampr.org/public/nmap/030516nmap.txt
I did the same thing a few years back but there was that IPIP,<-> BGP problem
I too have yacy installed. I just started it back up.
I am not to familiar with it, how do it get it to crawl the amprnet?