I student-taught a biology class on future human evolution, and I started the class off by handing out this poll. Most people said 50 years, which I thought chilling, if not far-fetched. My person opinion is between 500 and a thousand years. Keep in mind we've been around for about 500,000 years already. And the "evolve" option covers if we revert back to ape-men.
Notice that there is no "until 2012" option, for good reason.
Notice that there is no "until 2012" option, for good reason.