Ideally it should have the new dual core Turion processor with DDR2 support. As for graphics I believe that it will have the x1600 either at 128MB or 256MB. If they go for a 17" screen then we might see the x1800 in it
I think that what kent1146 said is the main reason for partitioning your disk.
I have a lot of friends that lost data when they had to reformat their HDD. Data that could have been saved if they had it on a different partition.