updated 12:15 pm EDT, Sat April 24, 2010
iPad has native USB support for many devices
A handful of discoveries in the past day have revealed that the iPad's Camera Connection Kit can be used for USB devices beyond just cameras. One test by TidBITS has discovered that it will work with most any USB headphone, headset or microphone, making it possible to either listen to music or take a VoIP call with normally computer-oriented add-ons. The call quality is "terrific" and could make it considerably easier to use Skype for those who don't want to use Bluetooth headsets.
The functionality also extends to keyboards, as a near-simultaneous check has shown that USB keyboards will work as well, although this was partly expected given the functionality of the official iPad Keyboard Dock. The convenience of the USB keyboard is also reduced as there's no stand when using the adapter.
In its intended role, the adapter works as expected and will add images to the Photos app when plugged in. Besides supporting RAW from high-end cameras, the iPad will import any captured photos at full resolution, including the EXIF metadata from the original shot. Video is also supported, and surprisingly the iPad will let photographers trim videos much as you do with the iPhone 3GS' simple editor. Clips are cut short, iLounge notes; any video larger than 640x480 and 5MB will be shrunk in resolution and length to fit the length. It's not certain why this is, although it may be a holdover from the iPhone.