I would recommend getting an Assembla or Unfuddle account (both free) and then using the built-in VCS support that they provide. Unfuddle provides full support for a free private Git repository. Even though you may not need issue tracking and a full bug system now, it never hurts to treat your project as if it was being done professionally.
I rarely see them mentioned but linode is probably the best deal I have seen. 19.95/month you get a VPS solution, full root access, 360mb ram, 200GB Transfer and they have awesome customer service. And no, I am not affiliated, its just nice to see a hosting company that serves its customers well @ Linode.com
Yeah I suspected that I fail as a yc poster. Bad title + long narrative means few replies. Still, I appreciate the response.
I work part-time for this company at a salary of about 65% less than market value amortized over my entire work period.
The mathematical models serve as predictions based on data collected. This is one of the main competencies of the service. However without the integration and infrastructure this wouldn't be too useful. I am probably replaceable in the sense that they could have found someone else but if that person was willing to work for cheap as me for no equity from the beginning and do same quality work is unlikely.
If I were to walk away, since I have pretty much designed and implemented most of the code base and infrastructure, this would probably be quite a bad position to leave them in as we have no other coders right now and we have looked to hire for several months with no avail.
The idea is I would continue working for a reduced salary after graduation. Probably reduced about 40-50% below market value.
You said in your post you were paid competitive salary. Why is it 65% less now? What are you basing your salary on?
From what you've said, it sounds like the mathematical models play a pretty significant role. If the product is like Digg, then the algorithms are 90% of the company (in fact I think K. Rose outsourced the site). If the product is like Myspace, however, then your contribution will be the other way around.
In your situation, the best bet is to negotiate your equity compensation based on opportunity cost. I recommend getting the negotiation finalized before the company does find a hire, since this gives you more leverage. I say start with 3% and negotiate downward.
I am not affiliated with that site but they seem fairly similar in concept. Not sure which I like better.