OK PEOPLE, for you folks who haven't been here for very long, this is what's going on:
Awhile back, Johan asked users to suggest mottos for the site. There were several really clever suggestions. Johan picked a few of these and is alternating using them. The "HVN and HEL" slogan is indeed a play on airport codes. HVN is New Haven, Connecticut, and HEL is Helsinki, Finland.
An unexamined life isn't worth living.