Welcome to news:yc on GitHub! ;P

Right now, I don't have much information here, but I hope to add more in the future. You can check out the source code itself (it's in "Classes", as is normal) or read the TODO list.

For building, just opening the Xcode project and hitting build should be good enough, but you might need to mess with target SDKs and such. I built this in Xcode 4, so you might need that, too: I'm not sure what the state of Xcode 4 is with regards to backwards compatability.