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Sure, he missed out on TED, but that's not stopping Michael Arrington from popping up at SXSW. We got a glimpse of him when pet-repreneur Ted Rheingold bounded in as a surprise guest during Battledecks II, a sort of PowerPoint karaoke where contestants narrate zany (!) slides on the fly. Now the whole gang can play from home: Suggest your headline for this photo in the comments.