SPONSORSHIP LEADERBOARD AD - 728 x 90 - $500 monthly
  Your banner ad will rotate with all leaderboard sponsors above the navigation bar on every page
  of the site.

FULL BANNER AD - 468 x 60 - $350 monthly
  Full banner ads rotate evenly .

BUTTON AD - 120 x 60 - $150 monthly
  Button ads rotate evenly.