So after much discussion on the forums, and a metric ton of procrastination, we’ve FINALLY added the experimental tagging system to R:TS.

The R:TS tagging system is now online and operational.

You can
look at the existing tags on each mix’s page, by clicking the tags on
the mix pages, and a complete tag list by click the Tags link next to
Games in the navigational menu.

You can add new tags by clicking
the Add New Tag link in the tags section of the mix you want to add the
tag to, and logging in with your ThaSauce user and pass on the next
page.