Seth, your job history is less than ideal, no offense intended here just a suggestion as an employer.
Consider combining your sales experience as opposed to listing all your different employers.... you look like a job hopper even though you're fresh out of college. Speaking of which, give your degree a little more pizzaz... be proud of it! I'd even consider putting it before your job "credentials."
It's not necessarily who you know. Since you are looking for a sales job, you are going to have to be aggressive in your search and interviews. Consider looking into cellular?
Also, every sales rep loathes cold calling, don't tell your prospective employer this though!
good luck!