An implementation of Colin Eberhardt's raywenderlich.com ReactiveCocoa tutorial in Swift.
I've been playing around trying to get ReactiveCocoa to play nice with Swift.
For more information, see my blog post which goes into detail about the interop issues and workarounds.
After cloning, you'll want to initialize the ReactiveCocoa submodule by doing:
git submodule init
git submodule update
This will check out my fork of ReactiveCocoa, which has a workaround for a Swift compiler error.