There was the beginning of a lively debate at my talk at Mesh earlier this week in Toronto. I say if Twitter ever gets competition, or thinks competition might be coming soon, they will buy a news organization, maybe several. But it hinges on this question. Can there be another Twitter? What if a service did everything Twitter did but had a 280-character limit. Just enough to be interesting, but not enough (maybe) to blow away the mode of use of Twitter. Would you try it? Do you think it would be useful?