I am not aware of a framebuffer driver that supports overlays, but I statically compile in framebuffer support (vesafb) and use the nVidia X driver with kernel module for AGP. In other words, I'm not sure what you want here... overlays on your framebuffer text consoles or X drivers?
"..the triumph of evil is for good men to do nothing."
VIDIA video driver RPMs for Fedora
:: see yum repo at livna.org