Alcohol/caffeine while breastfeeding?

I've read that the level of alcohol in your breastmilk is the same as the level in your bloodstream.  As a general rule, I don't think it's a good idea to have a drink then breastfeed (though I've been known to have a wine or beer with dinner and feed Ella again that evening).  I think once your baby sleeps through the night, or even just for a decent length of time, drinkies after their bedtime are fine, as by their next feed, there'll be nothing naughty left in your milk.  A book I read said that even if you want a proper night on the turps, by your baby's breakfast time you may be poisoned (hungover) but not poisonous. 

Caffeine?  Kind of depends on the baby.  My midwife said tea is fine but coffee really messes with their sleep/wake cycles.  In Ella's case though, I it doesn't make a bean of difference (maybe it's hereditary?  Coffee keeps me awake for hours, but DH can have one at bedtime and be fine).  Lots of caffeine isn't a great idea as I know in adults it stops your absorption of iron and depletes calcium stores, but some I think is perfectly fine.  I drink coffee every day, and have a wine with dinner or after Ella's in bed every few nights.