Just purchased a refurb 1 ghz combo 40 gb hd on Apple.com! This is for my mother-in-law. I would like to update the RAM from 128. Does anyone know the revision of this model? I want to make sure I get the right RAM. Oh by the way her first idea was to get "some computer from Wal-Mart, an e something oh yeah, emachine!" Thank God I saved her from that nightmare. I.