Ok, so far, thanks to google and various forums, I know of...

-novideo
-noconsole
-username %s
-password %s

Are there any others?

If anyone has a full list it would be appreciated. (Would also accept pointing me at a means to learn how to find out what all are... as /?  and -? didn't work.)

I wish I could help, but I'm not certain what you are referring to exactly.

Uh.. this?
I'm not sure what you're talking about either~

No, this...

AgeOfConan.exe -novideo -noconsole -username %1 -password %2

you might be interested in this

Quick Start

Yes, I use it. I'm interested to know what command line parameters there are. I know the -novideo skips the opening movies.

So does 'ENTER' :D

To all wondering what the hell the OP is talking about:

Yeah, i'm having a tough time trying to find anything on the subject...at least, not a nice comprehensive listing of stuff.

Anything specific you're trying to do? If you're wanting to code some sort of mod, the source code to that "Quick start" one is available, which may reference some switches in there.

Well, I know of auto-entering of username and password, skipping into movies (which when clicking or pressing enter STILL takes 10-15 seconds to progress through... I have alot of cpu and budget graphics)... and I've HEARD of, but not seen, options to adjust things like priority, affinity, multithreading, and the like.

Using the AoC quickstart application, it allows for a few of these options, but as there ARE these options, there is QUITE likely others as well. The quickstarter also supports entering command line options.

If you want a quick way to run it with command line options without using that program, there is also this batch file...

--- begin aoc.bat---
@ECHO off
IF EXIST LocalConfig.xml.bak GOTO bypass
COPY LocalConfig.xml LocalConfig.xml.bak
:bypass
TYPE LocalConfig.xml | FIND /V "" > LocalConfig.xml.tmp
MOVE LocalConfig.xml.tmp LocalConfig.xml
AgeOfConan.exe -novideo -noconsole -username %1 -password %2
MOVE LocalConfig.xml.bak LocalConfig.xml
---end aoc.bat---

Which would run like this....
Copy between the lines beginning with --- (but not those lines)
Paste it into a new text file
Save it as aoc.bat
Put it in your AoC folder
Make a shortcut to it
Edit the shortcut so that the 'target' looks like this...
"D:GamesAge of Conanaoc.bat" yourusername yourpassword
Run it
You'll be taken right to the login screen, with everything inputted, skipping patcher and opening videos.

The line...
AgeOfConan.exe -novideo -noconsole -username %1 -password %2
...is the magic place you can put command line options.

As per what a command line option is, I'll quote http://onlinedictionary.datasegment.com/word/command+line+option

command line option :
  (Or "option", "flag", "switch", "option switch") An
     argument to a command that modifies its function rather than
     providing data.  Options generally start with "-" in Unix or
     "/" in MS-DOS.  This is usually followed by a single letter
     or occasionally a digit.  More recently, GNU software
     adopted the --longoptionname style, usually in addition to
     traditional, single-character, -x style equivalents.

If you want to see an example of what they are in other programs, click on your Start button, then click Run...

Type in CMD and hit enter (if this does nothing, try COMMAND)

You'll be taken to a 'command prompt'. 

Now, at the command prompt, type the same thing you did before (CMD or COMMAND), and this time add a /? to it

Like this...
cmd /?
or command /?

This will show what command line options are available for the command interpreter

Heceldi wrote: I've HEARD of, but not seen, options to adjust things like priority, affinity, multithreading, and the like.

I don't think these are command line flags.  I remember having to use a Microsoft distributed program to edit the affinity of a program awhile ago (so it stayed edited), but I don't remember what I had to do.  If you're searching for affinity and command line, this might be why you can't find anything on it.  Priority and multithreading are under the same category as affinity and so finding one might lead to the others.