Great show again Victor can I clarify one thing and ask a question.
Firstly I have a 750GB hard drive but I at the moment only use around 270-300 GB, I have a Firewire ext drive which is a 500GB and of course at the moment that is plenty, so rather then 1.5 times your hard drive, which I understand is ideal would it be equally as well to say 1.5 times your data is sufficient.
Now I love Time Machine I think it's easy and unlike some (especially windows) apps it doesn't eat too much of your recourses when active.
Now I have not yet gone down this avenue, but if I purchase a portable ext drive, can I also use that as an extra drive to use time machine to back up to, that way I can store that drive off site, I realise that this means that the backup to that drive has less increments, but at least it gives you a second backup. Now can Time machine handle the fact that it has two completely different backup's? (hope that makes sense)