Anyone can set up to upload a podcast to iTunes. There were a couple of very unofficial remixes uploaded to iTunes in that way. So just because it is in a podcast, doesn't mean I'd be listing it on the site in the future.
I do agree though that these deserve a home somewhere in the page listings, even if it is just a footnote in the listings. Oakenfold's relationship with the band and wealth of content produced for the band, gives him a bit more of a step above a random third party remixer that drops a beat in behind a song...so I will find some way to fit them in. A lot more consideration is being given to these types of things and where they might fit, as is streaming only content like full songs that have appeared at u2.com.