I agree, in its current form I don't have any issues regarding bugs or stability, but assuming Yosemite support will be needed some time soon, as well as potentially a Mac App Store integration.
Other than that, I'd say it's a good candidate for a 1.0.0 release, so I'm not sure exactly what the need for $20k is, unless it's to reimburse for time already spent?
The project vaguely states: "We'll pick the most wanted features from our contributors, implement them in 1.0." But there needs to be a little more meat here. What are some examples of the types of features you are considering? What are the new killer features that will be coming?