I just bought the nightwing/starfire duo fig and i notice that they have flurry. my qusetions are:
1) can i use flurry as part of my duo team attack?
2)can the outsiders team abilty negate the minus 1 to damage on a duo team attack?
Thank you in advance

1) Nope. Duo attack lets you make 2 attacks, not actions (Flurry is an action).
2) Nope. Duo ability is not a power or TA, so Outsiders doesn't affect it (just like it doesn't affect the Transporter Move/Attack ability).
Sorry!

awwwww that sucks, it would be awesome to be able to attack 4 times in a row

Just to clarify:
You use a Power Action to activate Duo Attack and are given two free Close or Ranged combat Attacks.

You use a Close Combat Action (CCA) to activate Flurry (or Ranged Combat Action (RCA) to ativate Running shot.

Although long ranged Duo figures make Manuver a rather good card.