What sort of high does weed beer give you?
You'd get the same high as you would eating an edible (like a pot brownie), since both beer and food go through your intestines. Smoking your weed is so 2000-and-late.
Which style of beer will taste best with weed in it?
He's tried a whole slew of them, and has found any style of beer with hops in it works best: IPAs and Imperial IPAs being ideal. Turns out that weed and hops are "close relatives in the field", which makes them natural bedfellows in beer.
This is seriously illegal, right?
Since it's illegal to commercially sell a beer with any drugs in it, then yes. If the feds change their mind on marijuana being a dangerous Schedule 1 drug, this could eventually open the doors for legal weed beer, but homebrewing is definitely the fastest way to have some in your lifetime.
How much pot do you need to make this beer?
The recipe is right here. It only requires 3/4oz to produce a 5gal batch of beer. That's about 50ish beers. You can throw one helluva house party. Even better than the ones hosted by Kid 'n Play.