Toyota gives its popular Prius hybrid a few tweaks to keep it fresh for 2007. Notable revisions include a mildly freshened look and an improved interior. Models sold in Japan and Europe also get an optional Intelligent Parking Assist (IPA) feature, which allows the Prius to steer itself into a parking spot through the use of video cameras while the driver controls throttle input. Evidently, Toyota thinks that IPA should be considered a luxury feature in America, and has reserved the technology for the new 2007 Lexus LS 460.