mlmmj has undergone several upgrades since the last its ebuild was updated. The only change needed to the ebuild is that it needs to be renamed "mlmmj-1.2.4.ebuild", although you could change the SRC_URI to use the bz2 tarball rather than the gz one.
Created attachment 51917 [details, diff]
ChangeLog entry describing the updates for this version
upgraded to 1.2.4 in portage.