If you don't want to read my wonderful narrative, you can skip to the cliffsnotes at the end.
I went out today to do a little ECU logging and noticed a peculiar issue. While I was slowing down for a stop sign, I heard a bang like I hit a pothole or something, but when I looked back, I saw nothing. It definitely came from the right side. I've also noticed some brake squeaking too that's been around since I had the passenger side drive axle replaced but today, I think it got worse. Since that was the last thing to be apart, I thought I would take the wheel off and see if I could spot anything wrong. The only thing I could find was one of the wheel studs needs replacing. Anyway, I torqued the wheel back on to the owner's manual spec and took it for a test run. I pulled out of my driveway, and as soon as I hit the brakes coming up to the first stop sign (ever so slightly) *BANG*. I turned around, pulled into the driveway for another quick inspection, saw nothing, so I tried again. Same thing.
This only happened once or twice on a drive, usually at the beginning of it. I've wanted to replace all the pads & rotors since I got the car but haven't got around to it yet.
Cliffsnotes: Brakes squeaking more than usual. Occasional banging sound when brake pedal is pressed.