You can easily import emails if you have an IMAP access. Copy all your emails on your IMAP account and then copy them back from the IMAP account on the Mac.

Alternatively you can use Outlook2Mac (I never tried) :

http://www.littlemachines.com/

All (white) iBook G3 (500mhz up to 900mhz) are subject to the logic board repair program. It does not concern iBook G4. See below :

http://www.apple.com/support/ibook/faq