Dungeons And Dragons Online: DDO News: Action Points

While it still holds true that action points won't be in at release, Xundau mentions they're still looking into them:

We've already announced that we can't do action points the way they're described in the Eberron Campaign Setting
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That being said, we really like the idea behind action points in general (i.e., they emphasize and reinforce the idea that the players are heroes capable of feats above and beyond the norm). We can't promise anything quite yet, but we are currently tossing around a couple of ideas for alternate action point systems that are quite different gameplay-wise, but that stay true to the original intentions behind action points, if that makes sense.

You can read Xundau's post on the official forums by clicking here. Action points, in the words of Eberron creator, Keith Baker, "Action points allow the player to modify certain die rolls, getting that little bit of extra luck when it's required." There is a designer interview that discusses them here.