So, since this next patch is looking to be quite a bit bigger than I'd originally thought, I figured I might point out another thing that's brewing here.
Ptarth has been working on improving the consumables shop, which will now sell 7 things at once instead of just 3. Most of these will now cost around 7 credits... a pretty darn good price considering just how strong many of the consumables can be (seriously, something like that One Way Barrier for instance; try dropping that right in front of Wallmaster and watch how easy that fight gets...). Mystery Circuits, the things that are a lot like Isaac's pills, or potions in traditional roguelikes, will also appear there. Like with Isaac, these will be "identified" when used (some will randomly start out identified though) and often have strong effects, so it can be worth it to check these. Consumables are also mostly being moved OUT of other shops, since having pools blended like that is a little wonky.
Hmm.... it's occurred to me that it might be nice to have some sort of items that are capable of identifying Mystery Circuits before the player uses them. Isaac has an item like that, which is usually one I grab ASAP when possible (many roguelikes have such a thing too). I dunno why this didn't occur to me until just now...
Also, Inferno Cannon. You're welcome.