Hi LBW! I've been working with Keene/Moo on two of my books. Moo Press is their childrens' imprint, and they put out about eight books a year. Moo is the publisher for my Pirate's Alphabet, and Keene for Summer's Ashes in August. Diane Tinney is in charge of both imprints.
I've been incredibly happy with them so far -- they are professional and put out a very high-quality book. Because it is a small publishing house, the advances aren't huge, but they do pay them. Generally Diane and I have worked together to arrange publicity and events, etc, but they do send out review copies at no expense to me. The best part? They get books into brick and mortar stores.
I'd be happy to answer any other questions you might have.