Early 2007 I signed up with Vibrant Media (Intellitxt) and have been extremely happy with them. Your site must have high traffic to qualify, but it's worth applying to them. My Intellitxt payouts now exceed Adsense even though my Adsense impressions have skyrocketed they reduced payment - which forced me to look elsewhere for income - and I'm glad I did. Diversify!

Here's the Vibrant Media application process (text copied from their website).

How do I Join?

To join the program and get your Referral Awards simply send an email with Vibrant Ads Referral as the subject line to bdusa@vibrantmedia.com if in the US or bduk@vibrantmedia.com outside the US.

Please include the following information:

The name of the site(s) you wish to refer
The contact details of the person we should get in touch with
Your site(s) name
Your contact details
In addition, let us know if we can share your name along with your success using Vibrant Ads!

--------

Another new program is ADSDAQ ADSDAQ - A New Advertising Exchange from ContextWeb
They don't have a referral program yet so this referral to you is my treat!
I signed up at the end of November and so far they have easily made up the difference of income that I have lost from falling Adsense funds.


Hope this helps someone