By the looks of things this card is currently not supported for injection. But before you run out and buy an 3945ABG, it does take quite a while for Intel cards to become supported. I still remember when WifiWay was the only way to injectwith the 3945, now with Backtrack, its childs play.
If you must have injection now, buy an atheros card or 3945ABG
If not, wait and see.