Today at 3:00pm EST Microsoft and Toyota are holding a little webcast and, while they're staying mum on just what the topic of discussion will be, we're hearing they've been having some heart-to-hearts about making dumb power grids a little smarter. The details naturally are yet to be unveiled, but we're presuming it'll be similar to what Microsoft and Ford have worked on for the Focus Electric, technology that enables the car to know when rates are cheapest and only charge up then, also providing detailed data on the car's power consumption. The Tesla-powered RAV4 EV will be Toyota's first pure electric vehicle, and while it surely won't be as invigorating to drive as the similarly Tesla-powered Roadster, thanks to Microsoft maybe it'll be a little smarter. It'll certainly be cheaper. Update : Sure enough. Toyota and Microsoft have announced a ¥1 billion (about $12 million) deal to extend Microsoft's telematics wizardry (which ...