I did It's a Wonderful Life with live foley! Really fun. One actor was cast as the Foley Artist, and did about 90 percent of the cues live onstage, and the designer supplemented with a handful of called cues. What the cast found most helpful was a LOT of practice with the foley props - we had foodstuffs, water, bells, rocks, hammers, trays of stuff, several pairs of shoes, a foley door, etc. Running the lines wasn't quite enough; we learned that the foley had to be treated as another voice, and given space to land, just as a speaking part would be. (I played the foley part during some early rehearsals: banging on the table and calling out "door opens!")