Hi,
I ran it for a couple of weeks, but since 3D acceleration doesn't work under parallel, I exchanged it for openSuSE 10.2. By the way I do not imply that 3D acceleration works on openSuSE, but sabayon gave me other issues. Such as "emerge world" screwed up my KDE installation and since the only solution suggested at the time was a full recompile of qt3 and kde, I simply zapped my parallel file of my sabayon.
I did however try sabayon on one of my older laptop (toshiba 5100), I could never did managed to get 3D acceleration because of issues between the latest nVidia drivers and the brain defective card on that laptop. Eventually I did manage to get get openSuSE 10.2 fully 3D accelerated on that laptop. Maybe I'll retry Sabayon on it.