The most intriguing feature is the simulated Mall MAX stop (illustrated). I definitely want to take a closer look at this.
At a lengith of 1 minute and 24 seconds' time, this episode won't waste much of yours. The format seems encouraging: if they stay with short, informative yet light in tone "bite"-casts, they'll have a communications asset here. Transit, in general, is not something even people in Portland want to take a lot of time learning about and discussing; your average transit user probably just wants to know what's heading at them, and you don't need a lot of time to tell people this if you know what you're doing.
That being established, I hope the minds behind TriMetTV take time to make a few "extended" episodes on some deeper topic, say, a day in the life of a bus line or something (I'd find that quite fascinating myself).
All the info you need to tune in to TriMetTV can be found here, and if you have the latest Flash player and view it online, you can have closed-captions too.
We give it a thumbs-up, so far.