Standard .gif & .jpg formats are preferred. Animated .gifs are acceptable, as is reasonable use of Flash. All ad content must be worksafe, and no pupups or popunders or any other irritations will be accepted. No audio. Ever.
Rates Ad rates are calculated on a CPM basis (i.e. cost per 1,000 ads displayed), with discounts for both volume and duration. There is no minimum spend. Email details of what you want to advertise to email@example.com for a copy of the applicable rate card.