Can anyone suggest another alternative to buying a memory upgrade from another place other than the Apple company itself. I feel as if they are over charging for a 1 gb enhancement. I would like to buy preferably from NewEgg. Can someone please post a link for a memory upgrade that would fit best for a 12" powerbook 1.5 GHz, with 512 MB DDR inside and would show a definitive improvement within the computer. Thank You.