Im going to tell you a secret. Go to work every day, put in your 8 hours and don't give a shit about your job after that. Crunch time, not my problem. System fell over, not my problem. More work than one person can don in a week, not my problem.

If they fire you (and they might) find another job. Programers are in demand ALL OVER.

You don't want to get promoted, you don't want to climb the corporate ladder, you want to launch your own product while you still send money home.

And as for launching, well just launch. Just keep building and adding features -- don't market out of the gate but GO LIVE and be very public about what your working on and how it is coming (blog a paragraph or two a few times a week)

That work is on your resume now, it is part of who you are, and might be something someday but doesn't have to be something tomorrow... your creating for yourself.