They are masked on x86. That's bad. Current version is a lot newer than 1.06 in portage, see http://gear.torque.net/sg/#Utilities:%20sg_utils%20and%20sg3_utils It took me a while find their new website. The self-compiled package from downloaded sources 1.10 works fine for me.
1.06 removed, 1.08 marked stable on 'x86', 1.10 added (as '~x86'). Ebuilds should reach the rsync mirrors within an hour, please reopen this bug if you have any problems. Thanks!