This looks like an interesting site. I have a couple of aquariums and keep fish native to North America, including several species of madtom. Currently I have Slender Madtoms, Tadpole Madtoms, Stonecats, and one Brindled Madtom.
I've noticed most of the North American catfish discussion here is about Bullheads or Channel Cats. Around here, those are food fish

Anyhow, I was just wondering why there isn't more interest in madtoms. They are small enough, gentle enough and easy enough to care for that they are great for aquaria. You really can't say the same about their larger cousins.