Multiple Computers, one main backup drive?

Can multiple computers backup to one main backup drive?
I have a G5 desktop with a 250-GB drive (Mac OS X) and a 750-GB drive (which used to contain iTunes until I moved it to a new iMac).
So I was planning on using the G5 as the drive for Time Machine to back up to. I have my iMac, and two MacBooks using it.
Is this going to be problematical? Such as when more than one machine attempts to make a backup?

Time Machine can back up multiple computers to the same hard drive.
There are two options... one you can physically move the backup hard-drive around among the computers.
The second option is that you can backup over the network as long as all computers involved are running Leopard. To do this connect the backup drive to your G5. Turn on file sharing on the G5 for that drive. On the other computers connect to the shared drive from the Finder sidebar. The run System Preferences and in the Time Machine Preference pane select "Change Disk" and choose the network backup drive as the destination.

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