Is there a player for .mp4?

[alex jb]

I hate my Ipod

It chops off tracks and messes up album order (prob Itunes actually).
The only reason I stuck with it was beacuse my Touch was so poor on battery life in comparison to the Ipod.

I just ordered an extened batter and the nice cover from the recent thread here, so that should be sorted!

Now, in it's quest to simplify (read: mess up) my music collection, I tunes seems to have stored everything as .mp4 files.

Is there a player for WM6 that will play .mp4 or will I need to copy and convert them all back over?
Freeware would be ideal but if theres anything that's good, I'll buy a copy too.