Installing Mac OS X via FireWire Target Mode.

Since the Power Macintosh G3 AGP, all Macs have supported FireWire Target Mode, the successor to the somewhat clunkier SCSI Target Mode. (Here's some history on the two.) Hold down the T key when your more modern Mac starts up, and it will magically turn into a FireWire device, visible to any FireWire-enabled Mac that you hook it up to. Any drives (optical included) will be at the disposal of the host machine.

MacOSXHints has a page that's chock full o' hints on how to use FireWire Target Mode on various machines.

This should be handy for installing Tiger onto the B&W G3 and the iMac G3; I was going to wait for the RAM upgrade for the latter, and haven't really figured out why the former keeps failing with the Tiger DVD.