Our existing icon is a fluffy white cloud against a light blue background. The cloud has a graduation cap on it.
Our existing letterhead combines clouds with a blue sky and a stylized "knowledge tree."
Neither of us are artists so we just drew up something quickly in Illustrator. We would like to explore other possibilities before creating a full web site. It would be nice to have examples of logos that don't have to include a cloud, since that is so commonly used by other sorts of programs these days, e.g. SkyDrive, iCloud, etc.
It would be nice to have a simple logo that would be suitable for use as a computer icon as well. Somehow it should capture the idea of open skies, expansiveness, learning, possibility, etc. while being immediately clear and recognizable.
If you want to submit a more complex logo that would be fine too, as long as there a clear way we could use part of it as an icon (and perhaps build on it to make a full letterhead, splash screen etc.)
We realize this is a challenge! and look forward to viewing your submissions.