ricoh-sp150 : Ricoh SP 150 printer driver ( http://support.ricoh.com/bb/html/dr_ut_e/re1/model/sp150/sp150.htm )
samsung-unified-driver : Samsung Unified Linux Driver for printers and MFDs ( http://www.samsung.com )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a rion
For Paludis use this rsync : rsync://gentoo.zugaina.org/rion-portage
If you have a problem : ycarus(-at-)zugaina.org