Well said. Doing the enterprise / B2B thing is a whole different world than doing something consumer oriented. I wouldn't trade it for the world though... I'd much rather try to build something and then sell it to somebody for actual money (and by "somebody" I mean a company with a budget and money to spend), as opposed to the standard "get a lot of users first and then figure out how to monetize it" model.
On the flipside, as this article alludes to, it's not easy to get companies to part with their money, and it's definitely not fast. Learning to do B2B sales is a whole new beast if you havne't done it before (I hadn't, and I'm still trying to figure it out).