copy files to pocket pc from ubuntu through usb

I like to listen Radio-T, to watch RailsCasts and Google Video on my way to work. I use my pocket pc (Glofiish x600) for that.
I didn't find any way to copy files to my pocket pc with default ubuntu utilities. Yesterday I found wm5storage. It turns my phone into a flash drive so ubuntu easily mounts it. Now I don't need to boot in windows to copy new casts.