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 If you're cranking the air conditioner a lot this summer, a product bundle using Microsoft Hohm will tell you a lot about your upcoming energy bills--maybe even more than you want to know. 
Microsoft on Tuesday announced that it has tied its Hohm Web home energy-efficiency application to an electricity monitor called PowerCost Monitor. The combination, which uses a home broadband connection, lets people view home electricity from the Web or from the tabletop electricity monitor. 
Whole-home electricity monitors show you how much electricity a house is using at a given moment and how much it's costing you--sort of like a dashboard with a home speedometer and cost per mile. 
 
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