If you want a nice example of well documented community values via whois
whois -h whois.radb.net as3356
Everyone should take an example from them.
An update on the AS3257 community slide I included at the end of the BGP
Tutorial - it was pointed out that www.as3257.net/html/communities.htm no
longer existed as I had on the presentation. And there seem to be no links
to it on the Tiscali website either...