My beer started fermenting within the first half hour, and the airlock was bubbling like crazy until Wednesday. It slowed down after that and now has stopped. I'm going to open it up, measure the gravity, and taste it tomorrow. My plan is to let it age in the fermenter another week and then bottle it.
The airlock activity shows that fermentation took place. I don't know if it will taste good yet, but I do know it will have alcohol in it!