As a webmaster I would want good RSS feeds, that update daily (key). Try and get those wordpress whales.
Good text, nice samples.
Hosted galleries.
Full videos to chop up.
Ready made exit consoles, promotional mailers.
Geotargetted ads are nice, chatbots can work.
I am not a fan of the flash peel away ads, but some are good.
Here's some good tips listed here
Look at loadedcash, occash, and some of the other big players.