Infinite scrolling — can be annoying, I think, especially when trying to scroll down and click some footer links. Meetup .com recently made that impossible: When moving the mouse down towards the footer, instead they did more infinite scrolling, pushing the footer downwards even further, making it impossible to click. (Seems they've fixed this now)

There's a hybrid approach: One can scroll down a bit, maybe 1 page's worth of content, and thereafter, there's a Show More ... or Next button.

> classic one where there was category that stored forums

Forums inside categories? Where's that? Hmm I'm used to the opposite (categories inside a forum).

> Link to prototype

Interesting with categories to the left in their own column :- ) I've been thinking about doing that, on wide screens, in the software I'm developing

What motivates you to create Misago? / What made you start the project?