Ask HN: Should I disclose that I am working on a startup in a job interview?

I recently found a kick-ass telecommute job that could help me finance my startup while I bootstrap. I'd like to be honest with my potential employer about my startup project but I am afraid it might play against me. I don't want them to believe the startup is going to overlap on the job but at the same time, I wonder if it could demonstrate that I am motivated and really love what I do as a developer.

PS: The said company operates in a totally different market so there's absolutely no risk of competition with my startup.

So, should I disclose that I work on a startup in my free time?