The addon is found here, its in a folder that goes directly into the addons folder, as it's an actual addon with just an lua and toc file (standard):
http://www.mediafire.com/?tbicv03ypwyjlxz
What it does:
Well, it doesn't actually know it all, despite the name, but thats the fun in it all =D. All the commands are passed through /kia.
/kia help: Prints help.
Macro1->Macro13: Executes macro by number.
PrintMacro1->PrintMacro13: Lists the macro contents and a has a description.
Math: Under Construction (/calc 1+1 is the same as /print(1+1)).
U or Unit: Grabs information about the unit you are targeting.
C or Cursor: Gets basic Cursor information.
F or Faction: Gets information on a specific faction.
Spell: Opens the box to request Spell Information.
Item: Opens the box to request Item Information.
A or Achievement: Opens the box to request Achievement Information.
Instance or Me: Gets your instance information.
Macro: Creates all macros.
BG or Battleground: Gets the battleground score for your target.
T or Texture: Prints texture paths in to your chat box.
Show: Show buttons that on click will execute the specified macro. Hide: Hides all buttons.
Creation: /say the numerical order the target was created on their server (IE, I was 68 million).
The macros are some the RAoV macros, sort of as an additional piece, they'll include all of them (and get more attention) when the next RAoV movie comes out.
If you know WoWs API or Lua, then this won't do much but easily organize the information you would normally get in many different places and in an almost unreadable state. If you don't know WoWs API or Lua, then this is an awesome tool for people who are curious about things they target, where they are, achievements, spells, items, etc. It's all extremely extensive, totallying 138,381 characters in 3069 lines of code, and the best part - it's colorful =D.
Let me know what you think and what chages you want done to it after you've used it by posting what you feel. If you want something added go ahead and post that too, I'm taking requests (per say) for the next version. Current Version is 2.0.
----------Change Log-----------
--Added BG scoring features. Target someone in your bg and type "/bg". This is shotty at scoring for 1-39, 50-79, 81-85, because I haven't had any characters at that level range to test it out.
--Added Achievement tracking/removal on hyperlink click
--Added an event trace. All 'limited' events displayed have tooltip when you click on them.
--Added texture path lookup
--Made everything much more interactable, instead of just having text output, theres much, much more.
--Added Creation: Type /kia creation to /say your targets numerical creation.
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As always, if you don't type in or have any of the commands for KnowItAll, it runs silently, you won't even know it's there. But its always there in case you want to know something about anything.