Also, I did get a new intake. It's a CAI drawing air from behind the driver's side foglight. This left the big mass of unused airbox sitting atop the engine as the ECU is actually integrated into the airbox. I finally got around to remedying the situation this weekend.
Stock:
The ECU is the finned part with the Mazda emblem.
Mine:
Made a little bracket to tuck ECU between the engine and the battery. Note the CAI running down the bottom right. The CAI has definitely added a couple MPG.
Yes, I need to clean my engine bay.