Casio has announced two new pocket-sized digital cameras which record iTunes-compatible H.264 video. The EX-Z300 and EX-Z250 also offer 4x optical zoom lenses, 10.1 and 9.1 megapixel sensors, and will be available in October for $300 and $250, respectively. For more information on Casio’s iTunes-compatible cameras, see our review of the Casio Exilim EX-S10. The Sydney Morning Herald reports that some users attempting to access the iTunes Store…