Will corporate America use SaaS components?

Build the App from scratch - Expensive to build, expensive to maintain, job security for the author, bound to be riddled with bugs until version 3 at least, and worst of all given my deadline, it takes a long time (think of an estimate and multiply by 3)

Download some open source code form SourceForge - The Mega Corp USA will still be responsible for maintaining the code in the long run (Expensive), I need to customize the open source code to my requirements, but at least I have a running start which should reduce the time to delivery.