The XMPilot App has been released in the app store for iPad and iPhone. It is a free app and lets you add/change meta data during filming when used with a 500, 700 or F800 camera with the WiFi adapter.
I have seen a demo of the app and it looks very powerful and I can't wait to use it on most of my shoots!
Tim Bradley
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http://www.redcam.com.au