[actraub]

It really depends on your product, what you are doing, etc. pzxc is right, do prematurely optimize. You also need to decide if you have any serious liability. Is it just you are do you have any partners...

How to start a startup legal lecture http://startupclass.samaltman.com/courses/lec18/

How to file in delaware http://corp.delaware.gov/howtoform.shtml

Types of companies http://www.bizfilings.com/learn/compare-company-types.aspx