As a last project at @Facebook I helped design the App icon for the today released Events App. Try it here: https://itunes.apple.com/us/app/events-from-facebook-find/id1153443320
As you will see in the attachment, we explored a few, more like 137, different options. I’m very happy with the final outcome of what was a long and winding series of explorations that saw some amazing beautiful, fun, and also weird results. In my opinion the final result strikes just the right tone between fitting in with the familiar facebook icon family, having unique yet familiar symbology, and looking like it will be fun to use.