Gizmodo schreibt über einen möglichen Grund warum Apple für den iPod das Ogg-Format (noch?) nicht unterstützt, die Limitierung durch die bisher eingesetzte CPU.
The even newer 5020:
The 5020 is based on the 5003, and so has the cache bug fixed. It's capable of playing OGG with 25% or less hit on power (depending how much optimisation is done). I would suspect the 5020 will find its way into the next iPod, as it's cheaper and integrates both the firewire MAC and the USB2 mac/phy blocks which are separate chips on the gen3.
So in summary:
gen3 - In theory possible, but unlikely. mini - Very possible. gen4 (or my guess at what a gen4 would have in it) - Very possible.
[via Catweazel]