Ever wondered how much space your music collection is taking up on your hard disk? Press Applications -> Accessories -> Disk Usage Analyser. Click Scan Home and then watch the pretty visuals tell you that you'll have to shell out for an external hard disk some time soon.
That's right, the disk usage tool (Baobab) has a very colourful new chart view. And yes, I do rip all of my music into the FLAC format.