Extremely niche electronic item I wish existed: media player in the form factor of an iPod nano, SD card storage, supports .flac, can play videos, and uses a transreflective LCD with front lighting so I can use it sans backlight, and if I do need a light it's not being projected directly into my eyes.
I would go for an e-ink display were I never including videos.
Oh, and some sort of podcast management integration to track episodes listened.