However you feel about Apple's expensive adaptors, you're going to need new cables at some point. Apple's got them for you now. It just announced Lightning cables that connect to USB camera adapters and SD card adaptors, HDMI and VGA.
Those might not be as crucial as your basic charging cables, but it's nice to have the option now. The camera adaptors are $35 apiece in Australia, and the AV and VGA adaptors are $59. Expensive, annoying and sadly necessary. [Apple]