Well, with higher stamina next expac, burst damage will be less important than it is now.
But give this build a shot:
http://cata.wowhead.com/talent#fchbZbZfGfd0kIoho
I'm looking for arena. With recuperate the rogues can probably "wait" until their target is on low health (around 40% or so) and then do a massive shitload of burst. (ambush+backstab).
The only need a decent dagger, medium AP, high crit and high mastery.
What do you guys think?