So I finally discovered #motochat - an organized topic on Twitter where motorcyclists talk it up on Fridays at 2pm EST. The details are available at the motochat web page.
It's neat to talk it up with a bunch of riders who all seem to take the activity pretty seriously. I mean, you can find this kind of motorcycle discussion on your thread-based forum of choice - but there's something different about the real-time chat. And the participants seem far more friendly than those I've found at the __fill_in_the_blank__ forum.
This weekly event has led me to a few internet personalities with interesting blogs about motorcycling, so I recommend jumping into a #motochat or two.