Insider is a section for Outsider-related extras, including (but not limited to) concept artwork, guest art, background information, ship specs and other bonus material.

Outsider Data Files and Essays
Essays and Q&A sessions on various Outsider-related topics, chiefly compiled from the forums.    
  The Terrans (3/6/05)
  Map of Terran Space: 3D Java Version (10/24/02), 2D Static Version (10/25/02)
  Terran Ship Classes (8/22/09
  The Loroi (4/14/08
  Loroi Ship Classes (8/14/09
  Loroi Trade Language:
     Introduction (4/14/08
     Grammar (4/14/08
     Lexicon (4/24/06
  Loroi Timeline
(7/26/09
  Loroi Warrior Castes: Rank Structure (7/01/09
  History of the War (7/30/09
  Loroi Rites of Passage
(4/24/06
  Races of the Loroi Alliance (10/26/09
  Telepathy
(4/24/06)
  The Umiak
(7/30/09)  

  FTL Technology & Tactics (7/30/09
  Weapons Technology & Tactics (7/30/09
  Fuel & Support
(4/24/06)
  System Defenses
(2/05/03)

Concept Artwork
 
Loroi Character Design (10/26/09
  Alien Character Design (1/28/08
  Loroi Ships (10/26/09
  Terran & Umiak Ships (10/26/09
  Environment Design (5/31/09

Pinups, Holiday Greetings, etc.
 
Halloween 2001: Fireblade & Estennia (10/28/01
  Christmas 2002: Beryl (12/24/02
  Christmas 2003: Tempo (12/22/03
  Christmas 2005: Fireblade (12/29/05
  Halloween 2006: Tempo (10/31/06)
  Christmas 2007: Beryl (12/31/07), (wallpaper version)
  April Fool's 2008: Chibi Beryl (4/1/08
  Tempest Command Deck Wallpaper (4/1/08), (1600x1200 version
  Halloween 2008: Beryl (10/31/08
  Christmas 2009: Cloud (12/25/09

Creator's Diary
  Whatever
(4/14/08
  Monday, Monday... (4/17/06)
  Weekly... not.
(7/1/03
  Outsider's First Birthday 
(10/31/02
  The Prologue is Dead! Long live Chapter One! 
(5/13/02)

Guest Art
 
Outsider Guest Artwork (2/23/10
  Outsider Side Story (a fan comic by Andreas Oeltjen)
(2/20/08