Nope. The current software released does MP3, WAV and WMV. v3.0 of the software which hasn't been released yet does the above three and Ogg Vorbis and FLAC from what I hear.
MP3Pro and AAC would both require a license to get the decoder so unless somebody can find the cash then I doubt it would appear any time soon. No idea if MP4 would require a license. You'd also need an integer version of the codec as well to run on the ARM processor.

- Trevor