Many Sabayon users install packages from Entropy and also from Emerge.
Kurro is a gUI to Portage
I suggest a compiled copy of Kuroo 0.81 RC1, because is the last version ( now Kuroo is not continued) that works, also im KDE 4, i tested.
I suggest to make compilation of Kuroo and saving it to Entropy, because Kuroo have many users, and this week it will be removed from Official Portage repositories, and their ebuilds cannot more located from the original site: http://www.kuroo.org
I know that kuroo is for portage, but i hope that it may be useful for these Sabayon users that enjoys Entropy and also Portage.]If you want, you may include Portato, Himerge and Porthole.
They are found in Portage, but not compiled copies in Entropy.