Long story short, I've been using vBulletin for the past few years on my big board (first on 3.x and then 4.x), and recently have seen their 5.x demo and I'm very unimpressed. Thankfully, I found XF which seems like a very robust platform to build a website on.
I understand that the Resources manager (like the one on this website) has been scheduled for release in a future update. It's been quite some time since this was announced, however its also been quite some time since an upgrade, so I'm guessing it would be soon? I also understand XF is in the middle of a legal battle with IB which is to be settled early 2013, which may have caused delays.
This resource manager is exactly how I want the 'downloads' section of my website to work (ie. having a page to download a file and a separate thread to discuss it)..
The other main question I had:
if you look here http://xenforo.com/community/resources/categories/add-ons.28/
you can see child categories under Add-ons (like New Applications, Bridges & Integration, etc).. I was wondering, for those who are familiar with this manager, if it would be possible to have child categories to the child categories? This is needed for the sheer categories of downloads on my website.