While a lot of the Twitter architecture speculators are smart, this guy knows a few things about pub/sub tech, being one of the brains behind the now defunct (but apparently relaunching without Wyman) PubSub.com. I think he’s missing a feature or two that Twitter supports, but he does know the tracking feature. That’s basically what made PubSub so cool. And, let me tell you, if you can write something that keeps up with the rate of public blog posts, you’re clever. I tried writing some code to just catalog the stream and found the flow of data coming in daunting, to say the least.

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