1. Templates. The ability to include the content of another dynamic post into any of your posts on your entire forum is pretty amazing, when you think about it. The way that Elfmage designed it with NuWiki was that his bbcodes that were introduced with NuWiki could be leveraged throughout the forums, and not just on Wiki pages. This has had the unintended (but awesome) consequences of enabling posters to be really creative about how they reference other posts. If users want to reference documentation that changes over time, using the TEMPLATE bbcode is the perfect way to do that.

2. The other Wiki-related bbcodes, all of which are usable site-wide, are also pretty impressive. For example, using the header bbcodes (e.g., H1, H2, H3) on any of your posts automatically creates a table of contents for your particular post. The DIV bbcodes have enabled users to engage in stylistic artwork on their posts, and for my community - a large-scale role playing and fantasy artwork, music, and writing community - this has really opened up a great deal of how users choose to organize their posts and express themselves creatively.