Working on my big open source project of mine, in mostly C++ code and i'm getting spontaneous program exits in windows only (runs fine on mac/nix), and there's 3 of us digging at this for a few days and we're all confused and could use some outside help. Its C++ code, but its a nodejs project so...
What's New in Mac OS X Lion - Apple Developer
If you want to become a developer, it's $99/year. But yeah, you get to try this out and do bug reporting and such.