lol, the ! (explamation thingy) is after the Plus word
i mean "Messenger Plus! 3"
About nick2 (if u dont get it yet)..:
When you use /nick with a nick that has colors or formatting (bold, italic, etc...), Plus! adds a "Ctrl + O" (format reset) at the end. That's useful when you don't want that the "says:" has a format and when you use /me or auto-messages so they are displayed correctly.
/nick2 is the same but it never adds the "Ctrl + O".