I just wanted to kill my time... so I added pavatar support to the following websites:

dimitrioszaxos.com
fll.gr
fmag.gr
horizonstudio.gr
kostasmantziaris.com
ominus-djs.gr
photodiary.gr
tsoukas-xyleia.gr

... oh and yes I know rel pavatar has been rejected
http://microformats.org/wiki/rel-pavatar