LAX's most junior FO has a seniority number of 804 hired in May of 2000. A friend of mine who was in the same class as that dude has been trying to get in there for two years and can't seem to sneak in. SFO was just recently expanded by four pilots, and as a result, four relatively new hires got in there. The lowest line holder in SFO was hired in October of 2000, in LAX January of 2000.
There were several pilots who were awarded west coast 757 FO positions in the last bid, but due to the staffing crunch in the 737, were bypassed and are eligible for bypass pay as a result (which only works out to about 40¢ an hour). They might get their chance early next year, and I'm giving serious consideration to bidding the 757 in MDW then, too.