Questions to ask when launching new product

from http://evhead.com/2007/12/how-to-evaluate-new-product-idea.asp

* How difficult will it be to launch a worthwhile version 1.0?
* Is it clear why people should use it?
* How much value can you ultimately deliver? 
* How many people may ultimately use it?
* How will people learn about your product?
* How hard will it be to extract the money?
* Do you really want it to exist in the world?