[skrish]

"In reality, the only things you need to focus on away from the actual salary are specific details surrounding Intellectual Property Agreements and Non-Disclosure Agreements. More and more companies are stifling their developers creativity by restricting them from contributing to open source projects...."

Agreed. This is something that is essential to consider. With stackoverflow karma, github check-ins & the like becoming a way to evaluate your expertise, this is something that should be considered carefully.