Update: The potty I bought is made by Safety 1st and is part of the Nature Next line, made of bio-plastic and is a potty, trainer seat, and step stool all in one! Woo hoo! There are a few other items in the Nature Next line; a couple of different booster seats, baby bath tub, and safety gate.
I bought a potty last week. I picked out the one at Walmart made with recycled plastic in a no landfill factory, so I feel pretty good about the purchase. As an added bonus, the beige recycled plastic goes well with my color scheme.
So far we've just been talking a lot about bodily functions, which Ender really gets a kick out of. His new favorite word to say, besides "poop," is "butt." We haven't had anything actually end up in the potty yet, but it's always a fun time when he sits on it. He strains and strains and usually ends up farting. It's a step in the right direction, and he thinks it's hillarious.
I don't think he's really ready for full-on potty training. He couldn't care less if his diaper is dirty. In fact, it almost seems like he enjoys having poop in there. Gross.
I'm really not looking forward to all this...