"Four years is a lifetime!" - I know, belive me. And its not jail. I realized that being an entrepreneur is not the same as being a great programmer. There are lots of skills necessary, and the plan is to develop as many of those as possible with my current job so that I'm better prepared for my next one.
As you're apparently captive, I'd recommend making the most out of it. Technologies and trends shift, but your dreams and competencies will stick with you. Do whatever you want, with gusto.
That said, additional formal education is never a bad way to go.