Something isn't right here
Take a look here:http://gentoo-portage.com/Browse
That will show you stuff in portage. SabayonLinux uses portage, like I said, nothing special.
Savage -- http://gentoo-portage.com/Search?search=savage
layman -S <--will sync you to SabonLinux overlay
upon a fresh install you want to
emerge --sync && layman -S
maybe you're not using the correct names