Well done Piru! I have OS X Tiger, MophOS 1.4.5, Ubuntu and Gentoo all running froma menu at startup on my Pegasos II as well! You have to love the Pegasos. It simply is the best computer system ever made as far as I can see. If hardware GPU was supported it would be an awesome Mac, however the speed OS X gets is perfect and is no less then using a older mac that doesnt have Wuartz Extreme support. Say a Powerbook G3 Pismo for example, Its actually faster then one of those.
Its a shame we cant have OS4 in them as well. They would run it quite well.