create, delete playlist or at list edit existing playlist (add or remove tracks, change playng order...)

add a option to see/hide the hidden folders

Turn the optical out OFF when the unit is in standby.

It will be great possibility to set a parental control for some folders or files

It will be fantastic to play blu ray movies from a external usb blu ray device.

A larger font not for the subtitles (but also them!) but for the interface - the current font is very small and fuzzy for some of us (like me) .
I'm sure a lot of us old folk would appreciate the ability to have a larger font in the regular interface (ie menus, system settings etc)

Now we can use 1.0x, 1.1x, 1.2x, 2x and etc. zoom modes. But I think, it would be very good, if video frame could be automatically fit by the least side to fill the whole TV screen space.
It would be also nice to have this setting (i.e. "AutoZoom Off/LeastSide/MostSide") in Video Options

It would be great if wireless (IR) keyboard support were added. There are so many wireless (IR) keyboards out there already it would be easy to added the IR recognition for them. Some of the models out there are the WebTV / Dish (RT7W5XTW) keyboard , the Philips WebTV (SWK-8640) keyboard.

The keyboard could be used for a variety of options, including regular navigation/control, and of course for entering text for searches.

I like to save time and a lot of TV shows etc. really don't lose much impact when viewed at 1.5 times speed as far as the action goes. Subtitles are good, but pitch corrected audio really makes it do-able (and sometime even more enjoyable than at normal speed).

its nice to have an progressbar with time and stuff but...

- move it to top (that way it doesnt overlay subs)
- make it "cleaner" by leaving out the blue "warp" background (less overlay on video)
- show file info like video codec , audio codec, bitrate, fps etc.
- show the current output setting (resolution/fps)

Should support wma lossless (can already support FLAC). Is wma lossless any harder to implement than lower bitrate wma's? Or does this depend on licensing from microsoft?

new aspect ratio correction like 4:3 -> 16:9 letterbox -> 16:9 etc..

I have seem some comments about IMB files for movie reviews etc. I know it's a bid work but Popcorn Hour (PCH) found a very cool MovieJukeBox setup http://code.google.com/p/moviejukebox/wiki/MovieJukebox, something like this for WD TV would just be great.

Many of youtube files are with this Extension !