Ahh, I see. Unfortunately, at this time we only collect questions from our in-person audience that attends as well as the comment section from the Facebook live stream player. Apologies about this!
First of all, a clarification: the Facebook Live stream will be available after the event, right? I presume so, just making absolutely sure!
As an aside, it would be cool to have a recorded copy of source-quality video too. Maybe that's being a bit obsessive going that far, but I'm really looking forward to watching this event :) (and the last time I tried Facebook Live myself - doing the filming for someone else - the connection dropped 15 seconds in...)
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About commenting:
Hmm. There are few other general-purpose platforms that would be appropriate for this type of task (I can definitely concur that reddit for example wouldn't be concretely ideal, for a variety of reasons).
While a noteworthy amount of effort, perhaps the CHM site itself could be adapted to handle this. Obviously it would be most ideal to do this in a generalized way that could be reused for other things as well - maybe articles (such as the event article) could have a comment section (I'm envisaging a simple "Comments »" at the bottom - underneath the Location section in this case), with a realtime backend. That would make the system effectively implement the semantics of comments and realtime chat in one go. A bit of work to implement, but not at all impossible.
I'd envisage this feature being used in the context of "it'll probably be most convenient to comment on the Facebook stream directly, but if you don't have Facebook you can also use the CHM site over here." Time would tell what sort of split there would be.
I'm unfortunately not too great at keeping a good pace when I start projects (I'm too easily snowed under with real-life distractions and tasks, heh!), and that makes me slightly hesitant about offering to help implementing a system like this. On the other hand it could go really well. How does site maintenance work? Is there a volunteer team for that?
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I noticed that Alan Kay popped in here and answered my question. That was really awesome. :)