Ok - I ended up doing it.
I took a 5 gallon batch of Belgian wit and kegged it. After a few days of sitting in the keg, I put my orange zest in.
I zested two oranges finely and dropped them into a small amount of boiling water -- no more than a cup. Then I cut off the flame and poured the solution into the beer.
I tried it one day later -- there was a perfect amount of orange aroma and flavor. The Aroma definitely had a present orange flavor but it wasn't overbearing or inappropriate (at least I didn't think so). The beer went from an average beer to the best I had on tap (according to me, my wife, and friends).
The only drawback has been that there were tiny zesties floating around in the beer. It didn't affect the head at all. I've let it sit again for a couple weeks to see if I can get all the zesties to drop out.

