Here's what I've observed of / my experience with the chatroom so far:

• It is always running on a pomodoro schedule. I have been around for 25/5 and 50/10.
• Microphones are set to push-to-talk, and I've yet to hear anyone actually push and talk.
• When I enter, I usually say hi (using text chat) and someone else returns a friendly greeting, and informs me how much time is currently left on the pomodoro.
• It is not good form to chat while everyone is on a pomodoro. You will be chided.
• People usually wait until the end of a pomodoro to leave.
• Those people with a side-view camera usually have it turned on during work time, and then put the face-view camera on during break time. I find this optimal, but I only have one camera, so people get to see my lovely face for as long as I'm there.
• I and at least one other person felt awkward when first starting to work with webcam feeds on our computer screens. However, at least for me, it was easy to habituate to, and didn't make me work less efficiently while I was still getting accustomed to it. Sometimes when I'm working on my computer during the pomodoro, I have the chat window covered.
• On breaks, people have been very friendly, and it makes me feel a lot happier both while on breaks and while working.
• It feels like a shorter and quieter version of this when everyone gets back down to working again. It's a good feeling.

Mind you, I have used this for one hour yesterday and one afternoon today. This could all be a placebo. I will report back again in 2 weeks, and maybe in a few months, if I'm still using it then. All I know is that, today, my happiness level is much higher than normal, and my productivity level has been slightly higher than normal.