[silkstone]

Stepheno uses the Think cartridges on his printer which is 'chipped'. It all works but you lose the low ink warning, so you have to keep an eye on the cartridges to see if they're running out. It can damage the print head if you run for long when a cartridge is completely empty.

Unfortunately it also invalidates the printer warranty, although I guess you could swap the cartridges for genuine ones before making a claim.