hierarchical_select 5.x-3.0-beta1

Yes, finally, the first HS 3 beta!

✓ scalability issues have been fixed (The entire rendering process has been rewritten to use the Forms API, which required backporting features available only in Drupal 6. The CSS and JS have been rewritten almost completely as a result of this.)
✓ perfect graceful degradation (Compare JS enabled VS JS disabled. This is actually just a byproduct of the above change.)
✓ ability to create new items in the hierarchy

Other changes:
✓ more granular control over Views exposed filters (for both the Taxonomy and Content Taxonomy implementations)
✓ Hierarchical Select for menu parent selection
✓ enhanced configuration form (more intuitive, and with a preview)
✓ abstracted configuration form, to prevent duplicate form code for multiple modules
✓ overview of all Hierarchical Select form item configuration forms
✓ display number of matching nodes
✓ actual CCK widget for content_taxonomy (already takes advantage of the abstracted configuration form)
✓ Views exposed Taxonomy filters: supporting the **ALL** option
✓ remove dependency on jQuery Interface
✓ if available, use HTML 5 client-side database storage to reduce the number of queries to the server
✓ trigger JS events to allow for advanced interactions
✓ allow to set #size (like the Finder's Column View)
✓ much improved documentation