I have to agree with Evan I have been hearing about a psp2 for a long time I dont think its going to happen the have upgrades so you dont have to buy a new PSP im personally very happy with my PSP.
I also think that if you have a big scratch down the middle you should have taken better care of it. I have purchased an Inisashield I can scratch it with a key cheak out Evans article
Invisible Shield Protector For the Wiimote it talks all about it
Their You go
And they are planning on releasing the 8gb of memory later this year