You may also want to have a look at OS X v10.1, which was released yesterday.
It apparently fixes most of the minor annoyances with OS X (ppp 264, no DVD, speed issues, etc.) and also contains a more up-to-date set of drivers. If you have a new G4 (which was supplied with X) or a legitimate copy of OS X, you can upgrade for a token charge. Have a look at the apple website for info.
Failing that, have a look at:
www.macfixit.com
where a bunch of very helpful (but slightly sad!) mac junkies hang out - it's free, and they can (in my experience) sort out most problems!
[Edited for typo]
[ 28 September 2001: Message edited by: 1261 ]