Everything is fairly junior, seriously.
A couple months and you should have the base of your choice.
None.
Usually you have to wait until the next AE.
A fresh bid came out today, here are some basics:
ATL 777 CA: 1987 hire
NYC 777 CA: 1988 hire
ATL 767-400 CA: 1989 hire
ATL 767ER CA: 1991 hire
LAX 767ER CA: 1991 hire
NYC 767ER CA: 1991 hire
ATL 767 CA: 1991 hire
CVG 767 CA: 1990 hire
LAX 767 CA: 1997 hire
SLC 767 CA: 1988 hire
CVG 73N CA: 1989 hire
LAX 73N CA: 1997 hire
ATL M88 CA: 1999 hire
CVG M88 CA: 1991 hire
NYC M88 CA: 2000 hire
SLC M88 CA: 1997 hire
ATL 777 FO: 2007 hire
NYC 777 FO: 2000 hire
ATL 767-400 FO: 2001 hire
ATL 767ER FO: 2007 hire
LAX 767ER FO: 2007 hire
NYC 767ER FO: 2007 hire / new hire position
ATL 767ER FO: 2007 hire
ATL 767 FO: 2007 hire
CVG 767 FO: 2007 hire
LAX 767 FO: 2007 hire
SLC 767 FO: 2007 hire
CVG 73N FO: 2007 hire
LAX 73N FO: 2007 hire
ATL M88 FO: 2007 hire / new hire position
CVG M88 FO: 2007 hire
SLC M88 FO: 2007 hire
There may be more junior people in each position already in the category, but those are the results of the last AE posted a few minutes ago.