I have an N800
With the OS2008 beta I was able to view the following mp4 files in Media player

But with this final version I am NOT :-(

Anyone else?

I have the following in my RSS reader (Used to be in Video center)
PodshowTV for Nokia
http://www.podshow.com/collection/79056.xml

but the mp4 files it contains says "File format not supported" when I open it in Media player.