Current Release 0.3.7 | Changelog Released April 30, 2007
Added to my dev overlay: https://overlays.gentoo.org/svn/dev/betelgeuse/dev-python/sqlalchemy
NEED_PYTHON=2.4 Didn't remove this but it seems wrong as I have been running sqlalchemy with 2.5 without problems.
In portage. betelgeuse: NEED_PYTHON means that it requires >=python-2.4.