My favorite solution to the "when do we introduce a bottle?" question is:

There will come a day, whether it be 1, 2, 4, 6, or whatever weeks after the
baby is born, when you (new mom) will be talking on the phone, and you'll
look down, and the baby will be latched on and YOU WON'T REMEMBER PUTTING HIM
THERE.  That's the day (when you both have gotten so "good" at bf that it
doesn't take any conscious effort on your part) to introduce a practice
bottle.

This approach offers several things:  First, it encourages WATCHING THE BABY.
 My first son went breast-bottle-breast with no problems in the first week of
life while I was on Flagyl (another issue...).  My second suckled "wrong" on
the delivery table, and was 3 months old before he could feed without me
expressing milk into his mouth.  We all know you can't pin "numbers" on
babies.  Second, this is what we psychology majors call an "embedded
command":  "there WILL come a day".  This sets up a subconscious belief in
the mother that she can and will succeed at bf.  Third, it sort of portends
of "good things to come", the "fun part" of nursing, as I call it.  Lastly,
it lets her know that it's OK to consider leaving the baby with a bottle of
milk instead of her on occasion, but it still makes establishing successful
bf as the priority.

I go on in my teaching to suggest that Dad or Grandma "do the honors" of the
first bottle, and to bestow this "honor" on them--that they'll be the
first--when either starts making noise about wanting to feed the baby.
 Delayed gratification, yes.  My other favorite line to  support people that
are clamoring to jam an artificial nipple in the baby's mouth:  "There's alot
more to NURTURING a baby than "just" NOURISHING him."

Carol (in St. Louis, treading water from the 5" of snow we got today that
melted already!)