Hey man, thanks for bringing it up. I've been having conversations with some BTFers regarding design and function, including an open question posed on our Facebook page. I've been meaning to bring up certain parts of it here, primarily about what functionality are you looking for. When we introduced by-topic facebook liking and sharing (and/or tweeting), we found almost zero usage of these features, and I removed them. So we need to strike the right balance and give people what they're looking for.
I'll definitely be following up within the next few days on thoughts on improved features and design. To let you know what my current thought is, though, there are some interesting new forum softwares out there that look and feel more modern, but there's certain key functionality (e.g. Media Center) that would need to be rebuilt in addition to orchestrating a move of BTF's database and storage.