If you hike in places where it's okay to build a small fire, you could do that. Starbucks Via is about as light as it gets and it tastes great. One of the best pieces of ultralight backpacking gear to come out in the last couple of years, in my opinion. ;)
You'll still need a mug, but a Snowpeak 600 only weighs 2.8 oz.
If you don't want to build fires, or can't due to regulations, a homemade alcohol stove and enough fuel for a couple cups of coffee will only cost you another 4-5 oz or so.
Is coffee worth 7-8 oz? I think it is. Plus, the fuel weight goes down as you use it. However, I do skip it on fastpacking trips.
I just bought a Backcountry Boiler. It's 8 oz, plus another 1.5 oz if I want to carry the stopper and insulated sleeve. I'll also have to carry a small cup to go along with it, for a total of 9-10.5 oz. Slightly heavier than the alcohol setup on an overnight when I plan to cook both dinner and make coffee, but on longer trips, it's a pretty good weight savings. On top of that, it's safer, less hassle, and more efficient. Can't wait to get it!