Ok, like I said to Synapse, just give me a tentative Live gamertag and I'll add you to the list. Once you get your account set up and everything PM me here and tell me what your actual gamertag ends up being and I'll send you the invite then.
Clan is attached to your gamertag. You can log into XBL with any of the profiles, but you log in through the Gamertag. If you have multiple GT you can switch between clans that way. But not multiple profiles AFAIK.
Ok, like I said to Synapse, just give me a tentative Live gamertag and I'll add you to the list. Once you get your account set up and everything PM me here and tell me what your actual gamertag ends up being and I'll send you the invite then.
Also, to talk to your team you can press either the white button, or UP on the dpad. I think I prefer up on the d-pad. You don't have to hold either of them.
No, there really isn't visual "team chat" notification. Because allof the chatting is proximity, it can be tricky to tell if you are being heard by your team. However, you can tell you are being broadcast because there is a sort of static-click at the beginning when you open the "comm line." Like when you were a kid and made the static hiss pretending you have a walkie talkie -- it does that for a split second.
Because of the proxy chat, you can be heard pretty much anytime someone is near you, but when you press up, I guess that is the team chat and the hiss lets you know.