In the open threads on Linked In and Venture Beat, discussing the Valley's most exciting new ventures, there's one standout: Facebook, the college social network. But there's no consensus around any of the other nominees. So you decide. Here's an online poll, listing all the nominees. One vote per reader, so think carefully. This may measure the enthusiasm of a founder's friends, as much as the startup's promise; but that's a determinant of a venture's buzz as much as any more objective qualities. The count will be at end of day, Thursday.

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