Spectrwm-2.1.0 is outdated in portage, the 2.1.1 version is out. I tried doing an ebuild manually, but it complains about QA problems because of a soname problem in libwsmhack.so .
+*spectrwm-2.1.1 (01 Dec 2012) + + 01 Dec 2012; Michael Weber <xmw@gentoo.org> +spectrwm-2.1.1.ebuild: + Version bump (bug 445290 by elvis4526@gmail.com) +