Here's the smart way to do it... Follow Marlon Sanders' example!
Here's a survey Marlon is doing at the moment...
http://www.salesletters.com/may07Survey.htm
The first question (with multiple choice answers) is...
1) Which of the following 12 products would you be most likely to BUY in the next 30 days?
That's the smart way to do it... "Let the people decide!" That way, you're more likely to create a product that people will WANT to buy...
(I thought I'd just link to that as a good example!)
Check it out while it's still there (and you may even want to answer the questions), since I'm sure it will be taken down when the survey is finished...
Cheers,
Dien