Ive just picked out a few points

Maya now has four new rendering options!!! The improved software renderer, Mental Ray 3.2 (Fully integrated by the looks of it, please God please God lol), an all new vector renderer (woohoo) and an all new hardware renderer 20 times faster than b4....phew

The speed of the dynamics computation is upto a whopping 90% increase in areas...heehee

Maya paint effect can now be converted to polygons! luverly hehe

A new fur clamping system...oh boy


Have I missed out anything exciting? hehe