On halo 3 multiplayer some people have a cog like symbol between name

[alex e]

and skill level, wot is it?
I've long been registered on Bungie.net so i'm afraid to say that isn't the answer

 

[Shikamaru]

*points to Ryan*

 

[Lil Pg Bro]

Ummm - like this ?

If so - ive been wondering myself - If its not related Im So Sorry for waisting your time

 

[Ryan]

I'm pretty sure that symbol means the player with it has registered their gamertag on Bungie.net. It's just like on Halo 2 but it actually said "Bungie.net" on their name.