I-O Data has today announced the availability of 256 and 512 MB SD cards. The SD card is now beginning to establish itself in the digital camera market, the advent and availability of larger capacity cards will be very welcome to owners of SD/MMC storage cameras. Another positive aspect of the new cards is that there appear to be no known compatibility problems, so unlike the SmartMedia debacle of a few years ago existing SD/MMC digital cameras should be able to use these new cards without problems.