Sure he didn't have a fight scene, but who cares, Han never had a fight scene doesn't make him less of a character. SW is quickly being reduced to an intergalactic WWF
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Originally posted by: Darth Chaltab
Actually, Grevious can only use three lightsabers because he has to reserve one limb to stand up.
No his arms split in two so he actually has four arms, each of which can weild a saber. Whether he uses his feet to hold one in the movie has not been mentioned, so I guess technically he could use five at once.
But he does use four sabers when he fights Obi-wan on Utapau, you can see how the arms are designed to split in this picture:

here's a rendering of GG's vehicle if anyone cares:
