Your designs (#8, #9) sparked the idea of a penny as a globe or a penny with a globe superimposed over it (like you might be able to see a faint hint of Lincoln's head but over that would be an outline of the continents). Then a different tagline about "Spare change can change the world" or something along those lines. Not sure if this is something you would be willing to try but since it was your design that sparked the idea & conversation, I wanted to see if you might be willing to play with it!! Also, it might be a way to bring in a bit more color (blues & greens) to the design.
Thoughts? I'd love to see what you come up with given this new guidance. My design friends still love your logo! :-)
Thanks so much!
Cheers,
Leslie