Here is a small complied list of advertising companies. For when you get bored of AdSense

http://www.primaryads.com/

"PrimaryAds's affiliates are emailers, search marketing gurus, and websites. We guarantee that you can make more money with our network...we maintain the highest payouts and best service of any CPA affiliate network."

http://adbrite.com/

Text links, nice people, good money - recommeneded

http://casalemedia.com/

"Casale Media connects its publishers to a large selection of quality advertisers across all verticals, and provides the technology needed to track, analyze and optimize the value and utilization of online media inventory. All Casale Media publishers are provided with a custom web-based account interface that empowers them to take complete control over every conceivable aspect of ad management. Best of all, every ad delivered to publishers' sites is dynamically optimized to maximize advertising income and inventory allocation. That means happy advertisers, satisfied readers, and more revenue for publishers."

http://www.success-hk.com/pp/successaffiliate.asp

Sign up for our affiliate program and earn $$$ on every purchase and visitor that comes from your site. We will pay you a commission for every purchase to Success-HK.com through your site. - Success HK sells cool video game stuff which appeals to some readers of P2L

BURST! Media is one of the best, but more exclusive, advertising companies. They offer banner advertisements in an assortment of sizes with relatively high payouts.
http://www.burstmedia.com/

Commission Junction is a great affiliate program. They offer tons of advertisers to choose from with a large variety of different link types. From text links to search boxes to standard image sizes, even e-mail marketing. One downside is that there are very few CPC advertisers. Most of your income will have to come from CPA. Also, they have a 2 letter domain name... how cool is that.
http://www.cj.com/

There is also http://www.advertising.com

dEcade

Tribal Fusion is probably the best choice if you have a high traffic website (over 2,000 unique visitors daily).

Another good ad serving company is Fast Click. They require half the amount of unique visitors as Tribal Fusion.

I have heard very good things about both of these companies. For more information on companies like these, visit AdCache.com.

Google Adsense

Google AdSense is a fast and easy way for website publishers of all sizes to display relevant Google ads on their website's content pages and earn money. Because the ads are related to what your visitors are looking for on your site — or matched to the characteristics and interests of the visitors your content attracts — you'll finally have a way to both monetize and enhance your content pages.

Don't forget to check out the TOS etc!!

Link

If you like those new product ads on our site, check out Chitika! Awesome ad format and better pay outs than Adsense. If you do sign up, please use the P2L referral link

Faken

some of it has been metioned but i'll just summarize them

CPM Networks
Tribal Fusion - very hard to get into but they have the highest CPM rates
Fastclick
Casale Media
Burst Media
Interclick - good rates for popups and interstitial


CPC/PPC
Google Adsense - accept pretty much anyone, make sure you read their TOS though they dont mess around
Yahoo Publishing Network (Beta) - accepts US publisher only
Chitika

i may update my post later since i have to go now

Here is a list I came accross recently, I posted in another topic but I'll post it here too. Since this one is stickied .

I personally recommend Yahoo! Publisher Network for an US resident. Don't worry everyone, once it's out of BETA it will be available to everyone.

Yahoo! Publisher Network (BETA/USA Only)
Chitika
Clicksor
TargetPoint
BidClix
AllFeeds
Adhearus
AffiliateSensor
Bidvertiser
Revenue Pilot
Kanoodle Bright Ads
Enhance Interactive
Quigo AdSonar
Searchfeed
Vibrant Media IntelliTXT
Vibrant Media SmartAd
Nixie
MIVA AdRevenue Xpress
Fastclick
Burst! Media
ValueClick
contextWeb ContextAd
CoverClicks
AdBrite
Rydium
Claxon
ClixGalore

I have just signed up to Chitika through the P2L referral link, hopefully they allow me cause I haven't been happy with adsense. Hope this is good

Clicksor is the worset advertising company, dont respond to emails, do not target your ads and very very low payout.

Anywho....There is also text-link-ads.

http://www.text-link-ads.com Found that one a few days ago.

I am reading the fastclick TOS and it seems you can't place their ads on any website that contains forums, even if you do not put the ads on forums....seems a bit restrictive to me. I also do not see any unique hit requirements on fastclick, just monthly impression.

Found a new one today, its not on the list so

http://adengage.com

Looks ok

A wide range of options for payout as well. Check, epassport, paypal, wire, Western union

Text Link Ads is the best, no images to slow your site down and they pay quite good money!

THANK YOU. Someone to share my woes with. Say do you want to start an ad company blog and give clicksor a bad review? They 'upgraded' my minimum payout from $20 to $50 when I was at $19.54.