Does anybody care about spats between A-list bloggers anymore? If you do, one unfolded over the weekend between Microsoft's Dare Obasanjo (who blogs on his own, not for the company) and TechCrunch Michael Arrington. It's probably had about as much impact as a belch in a chili parlor, but here it is, the latest evidence of fraying nerves in the no longer upbeat world of Web 2.0: