I have registered my site with Innity for a long time now. The very first post about Innity was in April 2009. Previous requirements are 2,000 pageviews a day but the new requirements are 100,000 pageviews per month and 20,000 unique visitors a month. I find that in the long term we could earn a steady income. Innity is quite fair allow website publisher to display alternative ads in the event that there is no ads from them, this is what I liked about them.
There is big sites using Innity, therefore allowing Innity to land on great advertisers from Malaysia. If you have visitors from Malaysia, Innity is definitely some way you can make some extra money online.
Their support has been quick as the recent malware issue, they kept the communication with us to solve the issues, and I have inserted their code back to my website. Although it hurts a little, but I think all my rankings regain its position.
Nuffnang has been great at the start but unfortunately I see the income not being stable this few months and also it is not suitable for website as it is mainly targeted for blogs.
So give Innity a try if you meet their requirements.