Okay, my old PowerBook G4 1.5 seems to be on it's last legs (the superdrive doesn't work, it goes to sleep if I watch a Youtube video when the fans kick on high, and it has 0 battery life). I need to replace it for work and I see that they have the White Macbook 2.4's on the refurb store at the moment. My question is this. What are the real world use differences between the new Unibody 2.0 and the White 2.4? I usually have multiple Safari tabs open, run Pandora, have a Word doc or Powerpoint open, and run iPhoto quite a bit with a decent sized photo library. Other than that I blog for a few companies and use online blogging software that isn't taxing. Using iMovie is something that I would do as well. I have read that there are differences in the RAM and the graphics along with the screen (and of course the form factor), but what are the real world differences between these two machines? Thanks for any help.