Yes, its doable. On my roadmap for the blog comments plugin is an adapter to allow it to work for any unique page (be it a blog, video, etc) rather than write a unique adapter for each software as I am doing now.
It's in the long term though, if you're willing to sponsor development I'd move it up otherwise stay tuned 🙂
Is there a way to ajaxify widgets like the header ? For example, I have a online users widget (+ a shoutbox also) in a sidebar which doesn't need to be reloaded from scratch on each changing of page when navigating on my forum site.
I can make changes in code but does someone have some guidelines to be able to do it ? I never played with ajaxify...