Um, MP4 is a video file, and I'd be very surprised if they played video. By the way, the O-ROKR was a bluetooth device, so it'd be dependent on what was pushing bluetooth.
As for Oakley electronics not working with Apple, The iPhone has bluetooth and will work with the O-ROKR. I've had a bluetooth adapter for my 5th gen video iPod since 2006. I've never had an issue with cordless headphones and my iPod. Also, Oakley has been selling adapters for some time as well.
Whenever anyone says that Oakley electronics don't work with Apple, they have no idea what they're talking about.
I posted this a while ago:
My Split Thump syncs with iTunes. The only thing I have to do within iTunes is to specify under "preferences" that my files import as MP3s. Not even an issue, as MP3 is the standard, and AAC and M4V are Apple's marketing attempt to make people think that you have to buy an iPod to use iTunes. With that said, my phone can sync with iTunes, and my iPod can sync with Windows Media Player.
My point is that there are no compatibility issues, just people who don't realize that there aren't issues.
Aside from the price point, the Thumps were always designed to be an "active" piece of equipment. The originals weren't adjustable enough to accommodate everyone; the Thump 2, it was cheaper to buy a Gascan and an iPod than the Thump 2, for the same effect; the Thump Pro was close to what it should have been, but storage space was too limited; and the Split Thump fails completely as an active sunglass due to lack of unobtanium. It slips off your head easily like a Hijinx. It's great for chillin by a lake or on your porch, but for running, exercise, etc, it's a no go.
Great ideas, very forward thinking, and now technology is catching up. A 16gb Thump Pro, or even one that could switch micro SD cards, would be fairly epic. I'd buy another one.