Thanks for the tip on resizing volumes. As it happens I needed to use it immediately. I had partitioned a new hard drive I installed in my Mac Pro for an OS X 10.5 test partition, to which I will eventually add additional utilities, like TechTool Pro and Disk Warrior, when Leopard versions become available. In addition, I created a partition to back up the 10.5 install DVD and one for Time Machine. But the Leopard install turned out to be huge, roughly 40% larger than a comparable Tiger install. Even without the extra fonts, language kits and unnecessary printer drivers it is 8.5 GB. So the 10 GB partition I created for it was just a bit too small for comfort. Fortunately, it was the first partition on the drive so I could expand it to 15 GB - while booted in the same partition! - by deleting the two partitions following. I then recreated the two other partitions, taking a little from the Time Machine volume, which had plenty to spare. Of course the data on these volumes was lost but not hard to restore.

This is a marvelous feature, though not one for the faint or heart. I easily found instructions on how to do it in Disk Utility help. I wouldn't recommend it to the average user, though. But then, how many average users partition their drives in the first place?

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Don't anthropomorphize computers - They hate that.