37signals has a great job opening. But, i really like their description of what the business analyst job is all about: 

You’ll be responsible for reviewing daily sales, upgrades, downgrades, and cancellations. You’ll spot trends, establish and review analytics, monitor conversions, propose, implement, and measure strategies to increase revenues, grow profits, and improve margins. Using data and numbers, you’ll tell us things we didn’t know about our customers.

I'm going to steal that last line and use it forever.