Having nearly tested nearly every new feature of Leopard, I can say that I really like it! I’ve loved Tiger and I love Leopard even more. The features are deep-thought and are not “WOW” when you hear them from Apple’s website – but when you start to use Leopard you’ll see lot’s of small changes that make life easier.
One of the rather big changes was Time Machine. Time Machine is a automated backup application with which you can actually travel back in time to get your lost stuff back into the future. Really useful that tool!
So why mention this? Well, my good old PowerBook G4 ain’t that fastest machine in the universe. The rather small HD makes it hard for me to fit a vast iTunes library on it. The iTunes movies take lot’s of space with about 1 Gigabyte per movie. So there were just 34 Gigabytes saying good bye.
I ended having up only 5 Gigabytes! Not good! Not only cause of the low number – but because it slows everything down. Slooooooooowwwww.
So what did I do? Well, I just trashed my 30 movies and boom, 40 Gigabytes of free space. Wonder about them being lost? No, No! The movies are backed up on my external HD and I can access them whenever I need to. Just makes life so much easier. 
So if you ever need space – trust in Time Machine because you can rock the future by going back in time. 
Lastly, the Time Machine screenshot has been screenshoted from Apple’s website. Thanks Apple for the image and for this fantastic application!