Well, until it decides to run itself into a wall (which I do not know if it will happen), it should be a good server. Or, if you are into Linux, there are some PowerPC distrobutions that would run on it. I dunno, I'd like one to run Final Cut Server with and tend to archived data.... But that is just me. I'd probably have the thing die on me just as I got it intergrated into the workflow.
Still, running it as a server with drives in JBOD (if you can/if it makes sense), then you could potentially reclaim data if she did decide to push up pansies.... or have a couple large, seperate discs.