Let the hive mind of Engadget get that for you.
"I'm in the market for a new phone and money isn't a limitation. I'm also not partial to any particular US carrier, but here are some of the features I'd like to have: WiFi, GPS, good coverage in lots of places, push Gmail (a must!), physical keyboard (a must!), a touchscreen, decent battery life and a relatively slim body. And please, nothing that has a fruit logo on it. No offense to the fruit fans, though. Thanks!"
1. Don't lose what song I was playing when I connect to a computer (A simple thing but I really hate that "Feature"!)
2. The ability to automatically download album art and apply them to the MP3 ID3 tags using the built in wifi on the player (most of my MP3s don't have embedded album art)
3. A landscape QWERTY or Blackberry style keyboard for the internet browser, or use a system more like that on SE phones for the portrait phone style keyboard
4. Make the browser do a google search if you mistype an address rather than just saying that it is invalid. Especially if it's just invalid because I forgot the "http://" at the start!
5. Universal Mass Storage mode so I can plug it into Mac, Linux, pre-XP or non WM11 Windows
6. Better wifi connection utility (sometimes it refuses to connect despite having the correct password and settings)