it's about time we had a post-rock thread. it is the most expressive style of music, in my experience. and yes, i've listened to an extensive amount of everything.
here are some bands you guys should check out--besides the staples already mentioned, of course:
65daysofstatic
the american analog set
the ascent of everest
caspain
esmerine (my favorite post-rock of late)
fly pan am
giants
god is an astronaut
grails
hangedup
hrsta
jakob
laura
lights out asia
my dad vs. yours
pg.lost
salvatore
the samuel jackson five
saxon shore
set fire to flames
signal hill
six organs of admittance
sparrows swarm and sing
this is your captain speaking
the timeout drawer
tristeza
unwed sailor
ynda halda