PowerPC Mac Mini G4 1.25GHz

Could try putting v11 of XBMC on it as a media server hooked to your TV but no HD and would need more RAM. Can use an iPad, iPhone or Android with the XBMC app to control it.
Else a web browsing/email station somewhere in the house...iTunes server using the Remote app to control if you fitted some nice speakers...

 

Personally, I'd use it as a little home server. Minis are great for sticking somewhere and forgetting about them

 

I'm in a similar situation, I wan't to make use of the old mini somehow...

There are basically two things I can think of in my case -
a) Connect it to a flatscreen TV or a monitor and use it as a DVD player.
b) Use it as a fax server if you have a landline and need to send/receive the occasional fax.

The first option is not so useful anymore, unfortunately, and in the last ten years or so I've only had to telefax one measly page... All other uses I've managed to come up with so far are already covered using other devices.

 

Well, it can always be used as a paperweight...

(That goes for both the G4 and the G3 , i guess?)

 

Why not sell it in the market place?