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Eternal dilettante Jimmy Wales, the playboy founder of Wikipedia, has a new girlfriend-of-the-moment: Mother Nature. His for-profit offshoot wiki startup, Wikia, has launched Wikia Green, an edit-it-yourself guide to all things environmental. Like his past launched-and-abandoned efforts — anyone remember Campaigns Wikia, Wales's political supersite? — Wikia Green likely won't go far.But it will give Wales something to chatter about the next time he runs into Bono or Sir Richard Branson at a party. We'd bet his celebrity friends are too polite to ask the notoriously cheap Wales if he's actually springing for carbon offsets to make up for all of the emissions he generates through his nonstop round-the-world jet travel. Oh, and should we get into the contribution to global warming he makes through all the hot air that issues from his lips?