GREAT question! I would love to know what everyone has too!
I know NancyS will be on this LOL - soooo jealous of her
I have 768mb RAM and a 1.4 GHz AMD Athlon processor. I have enough ROM to spare that isn't an issue though with digiscrapping - it is all about the RAM!
I found PSP works much better since upgrading from 500something we had before- but I would always want more more more!!!