Filed under: TransportationMan, Tesla's been busy today -- in addition to the announcement of the Model S and Elon Musk's promise of a sub-$30K electric car in four years, word on the street is that the company's inked a deal with Daimler AG to supply it with lithium-ion batteries for upcoming electric cars. Daimler's CEO has said the company was open to leasing battery tech to get out an