It looks as though Skype have built a check into their software that stops you from using the video feature on anything less than an 800 MHz G4 - see here. £70 seems a lot to spend on a graphics card, considering that the entire machine is worth a lot less than that, and a 9200 is a pretty old card anyway (I recently got a 2600 HD with 512 MB Vram for £105 shipped for my new PC, so £70 for a very old card like the 9200 seems a lot anyway). If you really really need the performance increases offered by a 1 GHz G4 CPU and a £70 video card then you probably are better off with a newer machine, but that doesn't mean that the G3 is past it, in fact they are anything but.