2 - API calls: bookmark each of the pages del.icio.us/url/<hash value>, see how many people have bookmarked
3 - taking initial hash value: bookmark it:
4 - take the response, parse for:
6 - hash value: bookmark new page, continue ad inifinitum
8 - try retrieving apple.com or grc.com
9 - see http://transmission.m0k.org/trac/browser/trunk/macosx/PortChecker.h?rev=956 for example code