Thanks! It seems like, in my particular case, the bus is the better option because it will drop me at my hotel. I guess I need to figure out which Lufthansa bus to get on, though -- I assume there's more than one route into Munich.

From the link provided above, I see a roundtrip is cheaper than a single ticket (and that they also sell ticket books). Does anyone know if two people can use a "roundtrip" ticket one-way into town, or are they directionally marked?