Scoble reports the Leo Laporte has switched to Jaiku, a Twitter clone. Already I’m seeing messages there from new signups thanking both Scoble + Laporte. Does the world need another Twitter? I’m finding keeping up on Twitter hard enough as it is, imagine having to do it on two sites, or three, or more? And as for business models, do any of these sites have one as yet? Twitter has zero revenue…so the VC funds must be burning at Web 1.0 rates…it starts to give rise to the bubble argument in a way. Time will tell I guess.