SAnother failed relationship, another awkward online parting of ways for Jimmy Wales, the cofounder of Wikipedia. Just a few months ago, he was squiring new-agey PR impresario Andrea Weckerle, a self-described "global nomad," around the world. Now, insiders say, Weckerle has dumped Wales — you can tell, because she no longer follows his Twitter updates. The puzzle here: How does he put so much energy into chasing women when he's supposedly leading the world's largest collection of unfactchecked assertions backed up by hyperlinks, and taking on Google with Wikia, his for-profit offshoot?Oh, right — because he's not doing any of his jobs well. Sue Gardner, the executive director of Wikipedia's nonprofit parent, the Wikimedia Foundation, has made it clear she's running the show there. And Wikia? Its search engine, the project on which Wales has said he's focusing his energies, has 0.000079 percent of the market. The common thread: Wales is incapable of sustained attention on anything, or anyone. He once signaled his coupledom by tweeting thanks to an admirer from "Andrea and I." Weckerle has left a coded retort for Wales with this quote from Roy Disney: "It's not hard to make decisions when you know what your values are." Not as rough a farewell as Rachel Marsden, the conservative Canadian pundit. She auctioned Wales's clothes on eBay after he posted a note on Wikipedia stating that they were no longer an item. Too much trouble, too much effort, for Wales to repeat that kind of drama with Weckerle, we guess. Breaking up on Twitter? Far more suited to Jimmy's attention span. The only question: When are Wales's backers at Wikia — Bessemer Venture Partners and Amazon.com among them — going to lose interest in him, too?