One of the co-founders answered questions about the company when the job was posted, but I feel like I shouldn't assume that he's the one who is in charge of hiring. Since it's relatively new and has a lot of name overlap with other things already on the web, it's hard to find any information about the company online, much less the name of their hiring manager. I'm not even certain that they do have a hiring manager, since I seem to remember that they are just an 8 person team. I've heard that "To whom it may concern" is tacky, and normally I would say something along the lines of "Dear Head of Human Resources", but that clearly doesn't work in this case. Any idea what my salutation should be?

Later Edits:

Final Version:

To Joe Programmer and/or the AwesomeStartup.com hiring team,

(+ a few words in first paragraph explaining why I am addressing Joe Programmer)

I've already sent the email, so nothing you say here will save me. However, feel free to comment on my decision if you think your words be useful to future generations.

Old Version (left here because some people responded to it):

To the hiring manager for internships at Awesomestartup.com,

Additionally, because so many people made comments about the content of my letter: I did spent several hours writing the cover letter itself and making sure that it was awesome. After spending such a long time working on the important part, I asked this question because I wanted to make sure that it wouldn't get passed over by some human who was having a bad day and decided that my salutation was inappropriate. Not likely when the most likely reader of that email is a programmer type, I know, but I figured that it wouldn't hurt not to be sloppy.