Seems like it depends on your definition of soul. If you mean something immaterial, existing separate from the body, and existing after you die (a typical definition of soul?), I would have to say, "No, I don't have a soul." If you mean something of myself that is unique to me, I would say, "Yes, I have a soul".
I also agree with Lurkette that your poll choices are limited (and heavily biased toward atheism). There are likely many people who feel that they fall outside of your categories. (Don't consider themselves religious, but believe in "god", don't believe in "god", but consider themselves religious, agnostics, etc.). You might want to check out Hal's thread on how to construct a survey:
http://www.tfproject.org/tfp/showthr...highlight=poll
Regardless of the poll, it is an interesting question.