Gnumeric 1.2.0 works fine on sparc, please consider promoting to stable. Required packages: app-office/gnumeric-1.2.0 gnome-extra/libgsf-1.8.2
Ran into a dependency that didn't have any sparc keywords (gnome-extra/libgda). Building it now, and probably stabilize soon if no problems.
All done. thanks again :)