Ok, this isn't news, but I couldn't find any other reasonable place to put it.
So, put whatever you want fixed in skate 2, or added.

These are mine (in no particular order)

Walking

More slots to save vids

Huge level (plus access to the old one( like it finds a skate file save and you save the original skate onto the drive so you can play all the new features in the old level or something)

Split screen multiplayer (gotta have it)

Changeable camera

Put flags on the map so you can go back to the same place . Ability to put many flags and use them after you turn of the console

Ability to go out of the level on some occasions

Use unlocked secret characters in career and 2 player

A lot of hilarious secret characters

Create a board

Create a level

Take a picture of yourself at multiple angles, put it on a flash drive, and hook it up to the system, and it makes a character that looks exactly like you

Ability to use the avatars in xbox 360 fall update, and PSN Home

More tricks

Stalls, flatland tricks, lip tricks, etc.

Something crazy that will completely blow me away.

So post whatever you want here.