Offermobi, Sponsormob, (Leadbolt now has mobile banners and options)
Clickbank > Marketplace > Advanced > View offers with mobile properties enabled, this will give you a bunch of Clickbank offers that are completely mobilized.
If you take the route mentioned above and turn your website into an app, you can use Admob/Airpush and other mobile application advert companies.
To mobilize your site, just look for WPTouch on this forum, it will make it so mobile users are automatically directed to your mobile site, which you can populate with mobile adsense (pays well, BUT DO NOT PUT ON AN APP, so if you use this route, DO NOT MAKE AN APP OF YOUR WEBSITE WITH ADSENSE, UNLESS YOU WANT BANNED), you can turn your mobilized page where you capture peoples e-mails, to either promote offers and better yet bring them back to your regular site on their main PC.
This is just scratching the surface, there are so many possibilities.
His a realistic breakdown:
Admob: Garbage money unless app literally goes viral (or if you build a massive network of free apps, but don't bank on living off of it).
Airpush: If you have an awesome app, this can pay very well. Again, it depends on how many downloads your app gets, and people will quickly comment and brand it as an Airpush spam app but don't let that get to you.
Clickbank: I have launched 7 apps that tailor to Clickbank, only 1 of them actually turned into anything, and it averages 15 sales a month, nothing to write home about but extra money none the less and has the potential to grow.
Offermobi/SponsorMob: Who are you targeting and does your audience want a new IPAD? Just saying, some random audiences convert on these mobile CPA offers like crazy, at $1.50 a pop e-mail submit.
Find a profitable vein, HACK HACK HACK HACK HACK until its lifeless, then find another!