George Hubka

though of course, google may at some point change their fonts… today at least this is their font scheme for their adsense ads.

For the leaderboard
Title
line-height: 12px; font-size: 11px; font-family: verdana, arial, sans-serif;
text
line-height: 12px; font-size: 10px; font-family: verdana, arial, sans-serif;

For the large rectangle
Title
line-height: 14px;font-size: 11px; font-family: arial, sans-serif;
text
line-height: 14px;font-size: 10px; font-family: arial, sans-serif;