Without going into too much detail about my site idea (I'm paranoid like that , I need to be able to get companies to advertise within cellphone text messages that my site sends out. For instance, they would get to display maybe a 30 character message and the end of each text message. Obviously, there is no site with code I can copy and paste for these types of advertisements like I would with an AdSense banner. Is there some type of site that will allow me to connect with advertisers for unique ads or am I stuck trying to get in contact with individual companies? Thanks!
You will only be able to do a brand exposure for the companies that choose to advertise with your method. So make some statistics for them, show them to how many people you can send their ads, how many times per day/week/month, etc. It is possible, but it's hard work to be done . Good luck.