Walljump is actually a bit more useful then you think, saying it uses no KI. I find myself using it a lot when i'm being meleed and i'm out of ki, sometimes it helps, other times i just jump off the wall then they slam my ass back into it.
On a side note though, I sent masta another clip showing off some new flying animations (not what you think, a new system i implemented), and a better representation of walljumping using frieza + gohan, instead of the goku you've been seeing the last past couple months
And like usual, props to DT for the awesome anims ^_^
Edit in reply to MP: The build the footage was recorded with didnt have my latest code, you can only hold onto the wall for about 1.2 seconds max. You can also just go up to the wall and tap jump, allowing the player to instantly hop off of the wall.