Well if you have already made the jump to Ubuntu 8.04 LTS (Hardy Heron), it is very simple:
Open a terminal window and type at the $ prompt:
"sudo aptitude install sugar sugar-activities sugar-emulator "
Here it is in action:
Links:
[1] http://pulse.veltsos.com/category/it/hardwareolpc
[2] http://pulse.veltsos.com/category/it/software/software/os/linux