I've made a few honey ales. 2lbs of regular honey is what I use.
Like Blackwaterbrewer says, it does take longer to ferment and clean up.
I have added it at the begining of the boil, and in the last 10 minutes. The later addition has a stronger honey flavor to it (not sweet like honey, but still has that honey flavor), but either works - it depends on what you want - either way will yeild a lighter, higher ABV beer, it just depends on how much honey flavor you want.
Give it a try, either way will work, and you will still end up with a drinkable beer.