interesting thread. until i started looking, i didn't realize how many 'true' geos i have. they don't compare to many of the great names in this thread, though. my favorite is one of the latest, which purists would say isn't a true geo at all - iVenezia.com.
but i also like Austrailia.im.
among the english language pure geos i'm pleased with:
MaxtonNC.com
BrackettvilleTX.com
VeniceLA.com
MasaiMaraKenya.com
EritreaAfrica.com
PuebloCO.info
MidwayGeorgia.com
CherryHillNJ.com
AsburyParkNJ.com
AmazonRiver.co.uk
AlexandriaEgypt.co.uk
i like all of these, but if we could stretch the definition of geo i guess i should say my favorite is the one that gets the most organic traffic - EritreanNews.net