I love this - great basic recipe that can be modified easily based on your available fruit/nuts/etc on hand! Since it's fall and I had no berries, I used some apples that were looking bad (chopped up, sauteed in a little butter) - my kids loved them! I used quick oats and they worked fine w/o waiting overnight.
Second batch, I burnt the apples (oops!) so used frozen bananas and peaches. Also added flax meal to the mix. My mistake this time was substituting 1/4C turbinado sugar for the maple syrup (cuz syrup is expensive, we were running low), assuming the bananas would add enough sweetness - NOPE! They DID keep the cakes moist (as i left out the oil), but my kids didn't like them as much as the first batch, and I assume it's because they weren't as sweet.