Well, reading through all the replies, the following items were present on the collective wish list (might have missed something):
- HTML support
- RTF support
- PDF support
- DOC support
- other formats
- Memory slot
- Text Search
- Bookmarks
- Replacable battery
- Battery life
- USB Interface
- Hierarchical Browsing
- Custom/user fonts
- Orientation & Zooming
- Touch Screen
- SDK + Updatable Firrmware
- Archive support
- Random seeking
- Backlight / sidelight
- Unicode support
- Ergonomics
- Annotation & note sync
We need to have a multiple-choice poll on which features are most important for people.