Create playlists ON THE DEVICE and NIX the limit

I want to be able to create as many playlists as I want on the device, with the ability to name them and edit them and change song order.  Use a phonepad type text entry(display a phonepad and scroll to the right one etc) just like a cell phone text message.

There should be no limit to the number of songs I want to add to a playlist. Period.

Thanks,

Mike