We had just closed the acquisition of MySQL, so before I wrapped up, I asked, "And would you like a quick update on the newest addition to our family, MySQL?"
The CIO responded categorically with "we don't run MySQL, we run [name withheld to protect the proprietary]." The CISO said, "We can't just let developers download software off the net, you know, we've got regulation and security to worry about." The CTO smiled. Everyone else appeared to be sitting on their hands. I was going to leave it at that. Thanks for the business.
Until a (diplomatically) assertive Sun sales rep piped up, "Um... no, I connected with a buddy of mine over at MySQL, and had him check - you've downloaded MySQL more than 1,300 times in the last twelve months."
After a profoundly awkward silence, one of the individuals from their internal development team piped up, "Actually, everybody uses it. Why bother hassling with license agreements when MySQL's got you covered. We're stoked you bought them."
Things like this, plus all the embedded linux devices out there, mean that open source will be ubiquitous, even if people don't want it to be.