I was wondering what everyone considered an essential download for their Mac? I just got a new iBook and for me personally, two things I could never live without are Firefox and the VLC Media Player. The latter is the best option I have found for playing any video file no matter what codec was used. Even with the updated third party codecs installed, Quicktime seems to have problem with a lot of video files downloaded from places such as p2p, etc. One thing Ive looked into is a Trillian like client, does anyone have a recommendation?