What do IC and OOC mean? And why are people using double parentheses?

IC – In-character. This refers to the characters we play. A blog entry is likely considered "IC" and according to Blizzard's policy for RP servers, anything said in /say or /yell should be IC. When someone is speaking "ICly," they are not conveying the thoughts of the author or player. If you see this at the start of a post, it is role-play.

OOC – Out-of-character. This is the player speaking, not the character. Blogs can be as OOC; forums and events are usually considered OOC.

Double parens - Roleplayers often use double parentheses - (( )) - around their words to show that they are OOC when they are in a potentially IC situation. For example, many people, when responding OOCly to an IC blog entry, will use the double-parens to identify that it is the player speaking, not the character. Some players use {{ }} or < > but it all means, “This is me talking, not the character!” We tend to switch back and forth a lot, so watch in comments to see if the player is speaking IC or OOC.