no LAX base. that closed in the 90's? i think. bases are IAH, CLE, EWR, GUM. EWR and IAH are junior bases right now. CLE is known as a 'flying club' because of its small base size. GUM is fairly senior right now due to the nice benefits provided for GUM pilots (better pay, medical benefits day one, COLA - cost of living adjustment, etc).
talk of satellite bases appears to be drowned out by the reality of PBS coming soon - they want to see how staffing levels are affected before they make a call. one thing about PBS is that it lets them experiment with things a lot more (ie: make a fake LAX base in computer and see what it spits out). we'll see.
i've heard that they don't require seniority resignation from another carrier. not sure about that though.
good place to be and good time to get in as you can catch the rise of the hiring wave before it breaks into a whitecap.