(iriver only)
Enabled by clicking the joystick.(SELECT)
Disabled by clicking the joystick again (SELECT)

While enabled, the file selected is centered in the screen

Once enabled:
Up: Go to the previous letter of the alphabet
Down: Go to the next letter of the alphabet
Right: Lock the previously selected letter in place, and move the cursor to the next letter.
Left: Go to the previous letter, if/when possible

-- MichielVanDerKolk

This would work for all bitmap players, but is much more involved than the above. It should be a completely new file-listing mode.

I have another suggestion that isn't really anything like this, but could also be called "BrowseByAlphabet". It would require more work, and I'm not really capable of doing this work, but I thought I'd put my thoughts here. The idea is to have the regular filebrowser, but only show files starting with a certain letter - this letter can then be chosen from a column next to the filebrowser. Like so:

+---+---------------+
| A | Catch.mp3     |
| B | Cell.mp3      |
| C | Change.mp3    |
| D |>Challenge.mp3 |
| E | Close.mp3     |
| F | Cold.mp3      |
| G |               |
+---+---------------+

This is the browser set on C. If the user then presses left, the marker is set on C, and he can move up/down to get other songs shown. This would probably be particularly useful for the DB browser, where you're bound to have very long lists of songs/artists/albums.

Pressing left while in the letter-column would take you one folder up.

-- JonasHaeggqvist