iPod capable of WMA already
The iPod uses a PortalPlayer PP5002 'CPU' (dual-ARM package) which natively supports playback of WMA, including Microsoft DRM. Apple would be stupid to not support it - the work is already done and potential customers already own content in this format. Of course, wInTunes isn't going to encode to WMA, but it has to allow use of WMA.
Also interesting is that the PortalPlayer supports realtime encoding of MP3 and ACELP.NET. Of course you have to get the audio in somehow, but that's why they use a Wolfson Microelectronics WM8731L which has a nice A/D converter. I'm sure Apple isn't going to support the .NET encoder, but MP3 recording is ready to go, just waiting for a firewire microphone interface. Like, say, an iSight (raise your hand if you just said, "ohh..., that's why the iSight doesn't do DV").
The PortalPlayer is also programmable. They have a v.92 softmodem for the PP, so an MPEG-4 video decoder isn't entirely out of the question.
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