I will sell three text links on the site's main index page (www.worldwindcentral.com/hotspots/), which last month had 88704 views. This page is PR5. The links will go along the top, after the "Recently Submitted Hotspots" text, or around that area.
I will sell one site-wide (well, the Hotspots section) graphic which will go at the bottom of the left hand menu, below the categories section (ie, above the existing Vidahost graphic). Maximum dimensions for this ad are 120x240. The hotspots section (which I can only measure via the /hotspots/view_hotspot.php page, which runs all hotspots views) had 106,450 page views last month and PageRanks vary from 3 - 5.