What would happen if Google, or Facebook come calling? This is a question that comes up all the time, when we discuss the future of Pingwyn. My answer always is - we have our business goals and they have theirs. Nobody will try to copy us before we prove ourselves successful in the market.
Here is another interesting take on this question by Seth Godin:
In June of 2008, Google launched Knol, a monetizable Wikipedia, or, as some people saw it, a Squidoo killer. Not the same as what we were doing at Squidoo, not focused on individuals and their passions, but close enough for discomfort.