iOS Hardware Keyboard Support
If your community members often browse your Discourse forum using an iPad with a hardware keyboard, this theme component adds better support for iOS hardware keyboards to Discourse.
Tag Icons Component
Simply, this theme component allows the easy addition of FontAwesome icons to topic tags.
Open Source vs. Big Social?
This topic is a great discussion on if and how open source software like Discourse can be used for creating social network-like communities online.
Themes Can Now Be Localized
Recently the Discourse team added the ability for themes and theme components to have localized translations. If you have custom themes and users across multiple langugages, this may be of benefit to you.