You may not be quite as secretive about your alter ego as Clark Kent, but it can be a delicate matter to reveal your second (or third, or fourth...) professional identity to a client. The New York Times's new small business section has a feature today on just that question. The conclusion? News of your sideline can actually be impressive, and garner you more credibility, when deployed correctly. We hear from members all the time who do more than one type of freelance work (just look at Member of the Week Jill Pakulski). In fact, the desire to fulfill multiple professional ambitions can be a key motivator in going solo. What kinds of reactions--positive or negative--have you had from clients who learned of your other work? What's the oddest combination of professional talents you've ever heard of in one freelancer? Share your stories in the comments!