Since dev-lisp/sbcl is using one month release cycle, it is verry common that gentoo version lags. It would be convenient for "~x86" users if sbcl-cvs ebuild would be available. Reproducible: Always
Sorry, but we are not really adding live VCS stuff into the tree if there are some other alternatives (like, use snapshots, releases or whatever). http://www.gentoo.org/proj/en/devrel/handbook/handbook.xml?part=3&chap=1#doc_chap3
Marko, we might put one in an overlay. Come talk to us in #gentoo-lisp.