Hi all, I need your advice,

I've got a MacBook with 1.83 Ghz Intel Core Duo and 512 MB ram.

I would like to install Linux on it (single or dualboot with Mac).
I would like something lightweight, as I can't upgrade the memory.
I will use it for School Music Teacher work mainly (word program, .some basic music recording, internet)

Any suggestions in lightweight distro and Applications?

While we are at it, any suggestions with Online or OS independent Life Organizers (GTD or not?)

Feedback will be greatly appreciated.

Viktor