One idea there was at my group for a subject of a contest was that of Ahsoka dressed in something based from the upcoming Start Wars MMO, the Olld Republic, but it didn't win. So, I just decided to make based on that idea just cause I really wanted it.
Now, about the picture, well I chose that armor from that Zabrak Jedi Master who I can't remember his name, though I will say this one more based on a concept version I think. And the Lightsaber she has is really special, it's one that has two hues, blue and green, which is the fact that it contains two crystals of different color, so that theoretically makes it two times more powerful.
Tools: PS CS5,SAI