These are in no particular order. No decisions have been made yet about winners, but I will say I was very impressed with all the entries!
If you sent me an entry and it's missing, please let me know. I'm a little absentminded sometimes and I have a nagging feeling that there's a logo that isn't on here. I could just be crazy, though.
From Sandy (see explanation below, and note that these do not scale well as JPEGs, hence the blurriness is my fault, not hers):
Here's my entry!
In American Sign Language "to ride a bicycle" or say "bicycle" as an object, the speaker motions as if spinning cranks, peddling with their hands. This is represented by the directional arrows. The two circular objects are ancient astronomical symbols for the Sun and Earth. The Sun (or solar symbol) is the circle with a dot in its middle. The Earth (or sun cross) is the circle with the cross inside.
I've attached four variations as Photoshop images.