I made a cherry lager a few years ago, and it turned out fantastic. I had the cherries prepped and after the wort finished the 90 minute boil, I chilled it just a bit, down to 180*. I then added the cherries to the wort, and left if steep for 20 minutes. I then finished chilling the wort and transfered it to the primary, along with the mascerated cherries, and fermetned for one week. The end product looked like a strawberry soda, and had a wonderful cherry flavor. It was the favorite beer at the Memorial Day party we had.