Many new features for Drupal6

- optionally print a template log at bottom of each page. Shows what template files you could have used to theme your page or blocks or nodes or whatever.
- theme registry viewer
- all documentation links may be pointed to an arbitrary api.module site instead of api.drupal.org.
- a form for looking up documentation on any drupal function
- a full featured phpinfo() page [like older versions of devel]

There are still a few bits that need updating for D6. Patches welcome.