Blip.tv allows its users to create a custom show player for embedding an iPhone-compatible video into their site. This screencast by Justin Day from Blip.tv explains how to set up the player and how to get the correct embed code once you have the player set up. You can see it in action on your iPhone here.
Note you would not do this if using the vPIP plugin, but rather instead of using vPIP.

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[...] ads will now be viewable on the iPhone, which expands producers’ revenue opportunities. We’ve got the how-to for you right here. By Cheryl Colan | Posted in What’s New | Tagged embed, Flash, iPhone [...]