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I sent MoboVivo support a note asking about other IMAX apps -- the CEO got back to me, said thanks for posting on ipadforums.net...
An article + video of the CEO demonstrating the app:
Mobovivo lets customers brand its video technology - The Globe and Mail...
...and await approval from Apple. iTunes will update you as soon as the update is available.
Thank you for your patience,
MoboVivo Tech Support