Publishers Opportunities.
A list of companies which will pay for advertising space on your site.
Please do note that I do not have experience with them all.
Join these programs at your own risk.
I did alot of research into other sites that offer publishers the chance to sell space on there site and this was the list i came up with. Im just posting this to give people starting a site many options in ads that will save them looking around the place. Just do a google search for these and the site will come up (im lazy so no links, except for the hard ones to find) I will add links later when its not bed time.
Google
Yahoo
Chitika
Bidvertiser
Clicksor
Adbrite
Casale Media
BurstMedia
Kanoodle
BidClix
AllFeeds
Kontera
IntelliTXT
TargetPoint
AffiliateSensor
RevenuePilot
SearchFeed
Advertising
BudsMedia
Claxon Media
Clickcent
ContextClick
Enhance Interactive
Mamma Media Solutions
Miva Partners
Nixxie
Quigo
PayPopUp:
http://www.paypopup.com
CPC Contextual Advertising:
http://www.clicksor.com
Banner Advertising:
http://www.popinads.com
2 more i thought of while answering Lisa's question:
AdEngage
TTzMedia