Eric Ries, for example, might differ that you can't formalize learning about startups.
Almost every job has quite a bit "on the job" learning that you won't get in your academic studies. An MBA still teaches a lot of the skills, whether they be in finance, business planning, networking, IP issues, or presenting, that are useful for entrepreneurs. I imagine an MBA focused specifically on entrepreneurship would have even more useful stuff in the curriculum. Would be great if someone with such a qualification could chime in. A friend of mine with an MBA had one course where the main project was to basically to development a business from scratch and pitch it to real investors. Several students went on to launch those businesses after school.
I have an MBA and MS in CS from Arizona (who at the time was ranked top 10 in entrepreneurship). I did not have a focus in the MBA so I could do Computer Science but the entrepreneurship track sounded like a less serious/competitive YC with a few classes thrown in the mix. You grouped up with others and worked on an idea for a year. The program recruited successful retires to both teach the classes and advise you on your idea. It actually sounded fairly practical, and the caliber of advisors they recruited was pretty good (most of them had run several businesses and made a few million dollars over their lifetime). It was definitely less tech-oriented though.
An MBA in entrepreneurship has business classes adapted for an entrepreneurial audience.
A typical MBA involves the study of topics such as marketing, finance, risk management, accounting, economics, statistics, operations, HR, organizational dynamics, business law, and strategy.
Many of these can easily be adapted to be more useful for entrepreneurs. A finance class can focus on venture capital more than the bond market. A marketing class can focus on new product development more than the promotion of existing products. A law class can deal with the issues most relevant to startups. The accounting needs of a startup exec are different than those a future partner at Deloitte. etc.
As a clear example of the type of content that an entrepreneurial class could cover, Steve Blank's book Four Steps to the Epiphany originated not as a book, but as the notes for his class at Haas.
