@Jaime this is excellent thinking!
When we were discussing the Berlin event we came up with the need for a list like this also! When we go to universities to try to inspire people to create a challenge - such a list would be super cool. It is necessary. Great to include in our Berlin call for challenges for example.
Not sure if a category is the right place. But maybe. We could call it: “Pool of Open Questions” … but it would contain only one topic - the list. Because as soon as someone is creating a topic for just one problem it is a challenge and should go to one of the other channels.
And if we have a list. It needs to be curated. People can post questions in the stream. and someone organizes it on top?
. . .
I will add this to the Agenda for the next BoST call.