The Brothers Chaps said that they won't ever put any pop-ups on their site, and won't put in ads unless they can make it totally seamless.
I hadn't thought too much about this before, but now I've been scanning the old toons and sbemails to see how many plugs for products I can count, and there's a lot more than I originally thought. How many can you guys find? :)
Just name one at a time...it would be a shame if one guy took the fun of the hunt away from everyone else. I'll start with an easy one: Strong Bad's BMW lighter