No Torx any more..
A super small screw driver is all thats needed.
I just put a 7200RPM 500GB in mine..
A little tip for anyone looking to replace the hard drive:
On the battery cover inside its shows the screw locations and the different sizes. To make sure you get everything back where its supposed to be, as you take the screws out set them on the picture of where they came from. It matters what screw goes where. This way you can be sure what screw came out of which hole.
EDIT: OH, another thing I didnt realize when first swapping out the HD, there are 4 "screws" on the sides of the stock HD. You will need to put those on the new one to make sure it locks in place properly. If I recall correctly, those MIGHT be Torx, but I used vise grip pliers and they came out really easy. (you can grab the head of the screw with the pliers and turn it out)