There are several items at
UBBDev if you're interested in developing a modifications or working directly with code.
I have two "Premium Modifications" for UBB.threads geared towards users wanting to build a more Content Management style system into their community.
UBB.threads Pages allows you to create custom pages within UBB.threads
UBB.threads Links allows you to create a link directory within UBB.threads
Both utilize the same styling and content can be added through a custom Control Panel system, and you can allow your moderators (with the Edit Users permission) to modify your entries.
Content from UBB.threads Pages also populates in my
UBB.Sitemaps addon.