[mgse]

From what I've seen at IBM/HP, interns/coops usually get paid somewhere around $20 to $25. A bit lower if a freshman, higher if grad student. And last I heard, the MECOP program at Oregon State sets a floor of $15 an hour for interns and it sounds like the vast majority, if not all companies, pay more than that.

So while not an apples to apples comparison, I'd say at $15/hour you're low assuming no equity. That said, unless you need the money to survive, I would view the job as a springboard to your future goals.

So if you're learning a lot and enjoy what you're doing, I'd recommend sticking around. Maybe you can make a play for some equity? On the other hand, if you don't feel like your skills/resume are developing, consider looking for an upgrade (pay and personal development).

On the last point, I've been out of college for almost 10 years now and I still pick up quite a bit from my coworkers. It sounds like you're developing on an island which is both good and bad. You learn a lot, but you also miss out on the expertise of others. Something else to consider.