Changes are afoot at Research in Motion. The Canadian smartphone maker today announced the addition of two new names to top executive slots. Former Sony Mobile Communications executive VP Kristian Tear will be taking on the role of the company's chief operating officer. RIM's new chief marketing officer Frank Boulben, meanwhile, comes over from Lightsquared, after having worked for the likes of Vodafone, Vivendi and Orange. The news comes on the heels of word that new CEO Thorsten Heins has been "clearing house" at the ailing phone company.