I'm have the same problem as v00d00's.
The Sabayon 3.3b Live CD keeps asking to specify a device to boot. See the screenshot provided by v00d00. I'm running VirtualBox on my WinXP Pro laptop. I have no problems with PCLinuxOS, Mandriva, Ubuntu, Fedora 7. Oddly I'm experiencing some problems with Gentoo (though not unrelated to the boot issue) which was the basis of Sabayon.
If anyone has been able to solve this problem, please post the fix here. Thanks.