Hera's prayer is more or less cited from The Homeric Hymn to Apollo (translated by H. G. Evelyn-White). I've changed a word or two. That scene is by the way what Prometheus said that he saw in a vision before (but obviously he couldn't hear her words since he didn't know exactly what it was all about).
In the Iliad Hera says that her favourite places on earth are Argos, Sparta and Mycenae.
Gaia. I wonder if we ever meet her, and her attempts to tear Zeus a new ass hole with Typhon and the giantes. Which...he's earned more then a few times.
In one telling I read, she had Python. And it was to drain all her hatred and anger, giving birth to this snake thing to Chase Leto and to get out her pain too.