I see you found our IRC channel. Unfortunately I was AFK at the time. I like your idea to use Discourse for the forum replacement and have considered it myself. I've contacted them as an open source community asking for them to host our forums! Hopefully they get back to me.
In the mean time our Website definitely needs some love. The source for the site can be found here: https://github.com/fifengine/fifeweb
I can publish from that git repo very easily so you can contribute simply by forking the site and making any changes there for us to review. As far as look and feel of the site I will leave it up to your creative direction. Even small tweaks would be beneficial.
Looking forward to working with you!