I have been waiting for XenForo to add something so i can have Sub-forums listed on my forum and i notice the new beta version has now got this feature which is great but for some reason they are set out very widley giving a lot of ugly white space between them.
It would look better more closer together like other forum boards have.
I really hope this can be possibly done. Great work with the new Beta version its looking great.
I'm sure that some CSS can be added on your install to change them. I believe @Shelley has already accomplished this on hers. The Styling & Customizations Questions Forum will be more than helpful in getting the look you want (which I see @Brogan has already moved this to).