I've recently be experimenting with alternative stoves for my longer backpacking trips and found the Vargo: Triad Alcohol Stove. It was exactly what I was looking for.
This is a fantastic stove if you want to go lighter. Weighing in at 5 ounces and taking up very little pack space; it really is a must have if you want to go lighter. What I was very surprised with, is its versatility. I love to not only boil water but actually cook food. While the flame can not be adjusted you can improvise with cooking pot height. I would highly recommend this stove for both long and short trips as a lighter option.