Evan Williams writes in a blog post that he will remains on its board of directors, but hints at life after Twitter. "It's time to pick up a whiteboard marker and think fresh," he writes. "While I doubt I'll get so lucky a third time, as my good friend Biz Stone likes to say, 'Creativity is a renewable resource.' Let's see what happens."
Williams may have stepped aside, but Twitter cofounder Jack Dorsey returned as head of product.