Smart Phone Smarties

I love my iPhone, and not just because of my hardcore Angry Birds habit. I also love it because companies are offering exclusive coupons and deals through their store apps and mobile coupon programs. Some of the programs are available via text, and there's no smarty pants phone required, so everyone with texting capabilities on their phone can get in on the mobile couponing.
Numerous companies are doing this, and I've rounded up my top five, plus one bonus app I think deal seekers might be interested in.