read on..
1) I used pacific highway ( known as the truck crossing ) not
the peace arch crossing at blaine ( which is very busy ).
check out
www.vancouver.hm ( for more info on the 3 border corssings)
They question you anyway, but the Qs are not the suspicious type,
did you get any guns/cigarettes/liquor ? how did you get here...
plane to sea-tac, car to vancouver ? anyone you know in vancouver ?
expected address = hotel address at vancouver , proof of funds,
goods to follow list...very friendly customs and immigration officers.
2) No questions about the US employer at all.
3) Yes I did had an I-140 filed but I had a valid H1 visa and
I-94 which I used to come back...no stamps from the INS on
entry back to INS.