March 15, 2009: Update
We are happy to announce that hierarchical tagging is now live on
threetags.com.
Use semicolons (;) to separate tags, and colons (:) to separate sub-
tags.
This is a rather unique feature, as there is no "standard" approach to
hierarchical tagging. Please let us know if our intuitions about the
best default behavior resonate, or if you would like to see something
working differently.
Another updates:
- mass add/remove tags
- several minor bug fixes
threetags.com development team