There are a good amount of services that help you incorporate your startup for S Corp, C Corp or LLC, like Incorporate.com and Agents & Corporations. They help you put together the documents you need like bylaws and such and include Registered Agent services for a $200 premium over the state filing fee.
Did you use such a service? If so, which one? If not, why not? (And if not, how did you secure a Registered Agent?)