NASDAQ has just released the QFolio Portfolio Manager app for Playbook. It's not just limited to NASDAQ stock but you can get data from other exchanges like NYSE. I've just played with it a bit but so far seems very slick.
Yeah just tried it out tonight, I added all the stocks I usually look at in my watchlist and the stucks that I own in my portfolio. Gives out all the info I need easily ... looks nice too.
Might need some improvements as it get slow when its updating the stocks