My wishlist is simple:
1.) Ability to make new albums for organizing photos.. ON THE DEVICE.
2.) Email client that allows me to load images per message, or sender, instead of the all or none route.
3.) Ability to edit MP3 tags on the device, and IF I update the tags on the PC, have it auto-update the ones on the device. (Nothing I hate more than properly configuring my ID3 tags with artwork and such, only to have to fully delete them on the device just to update said ID3 info.
4.) As mentioned above... user definable dictionary. Autocorrect has murdered SOO many words.
5.) Wireless sync... from my PC/Mac to Itunes if the devices are on the same WiFi, as well as across the 'Cloud'.
6.) Sorting playlists and audiotracks via portions of the tag OTHER than Artist/Genre/Album... I've done some DJing at a few weddings, and I'd like to be able to bring up something from the 60s and 70s when requested.
Truthfully? (and I'm sure I'll get flamed for this) if I could merge the Xoom I use for work and the iPad2 I use for personal use.. it'd be the perfect device... on their own they each have glaring flaws.. but together, I can't really think of 1 fault the other can't make up for.