I use citrus zest in some of my beers (you should really use only fresh zest, not the whole peel, but that's another discussion). I put the zest in a weighted hop bag, with long string attached, in a jar and add enough vodka to cover and let that steep for a few days. The bag is weighted with glass marble-like beads used in flower arranging I got from a craft store. When I'm ready, I put the bag in the fermenter, using the string to suspend it roughly in the middle of the beer. I add the steeping vodka tot he beer as well. Then again, sometimes I skip the bag and just dump the steeped zest and vodka into the beer.
"Chill haze is not a flaw. But if you really hate it, try Clarity Ferm. It works!"
Warrior's Ale II (w/exp 6300 hops)
Quadro (quadrotriticale ale)
Black Bat'Leth Stout
Targ's Blood Nut Brown Ale
Battle Cruiser Blonde Ale
Supersecret sour beer experiment v0.5
Supersecret sour beer experiment v1.0
Supersecret sour beer experiment v1.5