Platform/Codebase Management:
Aegir - basically a way to publish the following Drupal distributions, migrate, upgrade, and manage them.
Best practices surrounding managing multiple Drupal sites (Sharing Code Bases)
Wildcard DNS Setup
CHMOD/CHOWN on Linux Shell, and SSH capabilities
Best practice understandings
Git / Drush Make files
Drupal Distributions:
Pressflow - Speed Drupal
Project Mercury - Speed Drupal - hosting environment
Barracuda Aegir (really a distribution tool...)
OpenAtrium - Intranet
Drupal Commons (Acquia) - Social Network
Acquia Drupal
Eduglu - LMS kinda
Managing News - http://managingnews.com/
Prosepoint - online news
Open Publish - online news with focus on semantic content via Calais
Media Mosa - http://www.mediamosa.org/ - make your own media delivery
Tattler App - manage online news sources / feeds
COD - COD stands for Conference Organizing Distribution
Volunteer Rally - http://github.com/opensourcery/Volunteer-Rally
Drupal Hosts / SaaS:
DrupalGardens(Acquia)
Buzzr
Module Awareness / Real World Use:
CCK / Views / Panels
Context
Apache Solr (or contextual search)
Ubercart / Drupal Commerce
Newsletter Tools (mailchimp, EMF, etc.)
Too many to mention, but basically a grasp of what modules to use in different situations.
Technical Skills:
PHP
DNS
jQuery
XHTML / HTML 5
CSS (2 -3)
Graphics Design
Semantic Web features of Drupal 7
Writing modules from scratch (using Drupal's hooks)
SVN/Git
Agile development for the Ubuntu operating system.
Linux Server Skills
SSL - how to manage SSL across multiple sites in an efficient manner
Related Competencies
Copy Writing
Working with Newsletter tools (Mailchimp, CiviCRM, SugarCRM)
Basic Design Skills (photoshop, GIMP, etc.)