I talk about this issue with clients regularly and it is one of the fundamental decisions that many small business owners are faced with when thinking about Oklahoma business law:
Do I operate my business as corporation or a limited liability company?
A few months ago I posted my Entity Explanation Table which provides an overview of the factors to consider in choosing between a corporation and a limited liability company. To add to this discussion, take a look at this recent article To C or LLC, that is the question from Brad McCarty at The Next Web
The carries out the corporation vs. LLC discussion in a bit more detail.