Hi @user3141, happy to welcome you to the community! 
A Forum widget sounds like a really cool and promising idea — and we’re sorry it’s not in our catalog (yet!). To be honest, it goes a bit beyond the scope of our current widget concept, and at the moment, we don’t have a solution that’s both functional and affordable enough to fit our business model.
That said, we haven’t given up on the idea, and we’ll definitely share any updates here if that changes 
But we’re on the verge of releasing our Comments widget, which might be useful too! Feel free to follow the updates in this thread: Widget for comments - please!