Circuit City - Clueless sales people, (I was once told that a laptop I was looking at "has to run vista because of the drivers that are installed"), dishonest business practices and prices that are guaranteed to be significantly higher than what you see in other places.
The question is will B&H become a victim of its own success? As Joel says in the article, he doesn't even comparison shop anymore. I've been using B&H for years, and while I don't comparison shop, I almost always go with B&H because of their terrific customer service and I always know what I'm getting (none of that annoying "well, you know this model doesn't come with a battery" bullshit).
My experience tells me that eventually something will change in the mindset of the org, either the guy calling the shots will start to cash in on those years of trust, or his son will take over and he will cash in, or they become a publicly traded company where the board members care more about next quarters profits than a long term sustainable business. I would wager Joel's article will accelerate that process.
That makes me wonder...perhaps the publicly traded corporate structure is not conducive to a company that wants to win on price, quality and customer experience.