So can you? Let's say a friend of mine got one a month or two ago, can he get another beta key today?

it is possible, but not guaranteed that you'll get in again after a previous beta. If you're "borrowing" your friends code, I wouldn't say another word about that. typically reinvites dont get a new code though.

I meant my "friend" as in me. I didn't want to say that I may or may not have gotten one in the past.

We are allowed to say if we got into the beta, but that is the extent of it. They'll groan at you for it, because it really does open more people up into talking about NDA-protected stuff on this forum, which is not allowed. There is a proper forum and if you were in the beta in the past, you know where that is. If you were on in the past you can try to log in when it's officially open

Seriously, does no one read the NDA?

There are Beta Forums, you know where they are, you were given a link, post in there if you have a Beta Key.