4gb is not worth it, unless you're doing some majorly intensive 3d modeling/rendering you won't need 4gb. Until the 2gb sticks are sold retail and come down in price there is almost no reason to get that much RAM in a notebook. You cuold get a whole 'nother XPS for the price of the 4gb upgrade.
Did anyone else notice that it looks like the XPS on the back of the LCD panel is lit up? I'm not sure if it's just the picture on Dell's website or if it's actually lighted. I hope it is, that would be sweet!!!
