TomTom has released version 1.2 of its TomTom U.S. & Canada turn-by-turn navigation application, adding support for the iPod touch and original iPhone. The inclusion of iPod touch and iPhone support means the application can now be used on those devices when connected to third-party GPS solutions, such as the TomTom Car Kit. Other improvements include improved search and route summary screens, updated maps and points of interest databases, an…