You can follow along at the repo for the vscode-hxcpp-debug project: https://github.com/jcward/vscode-hxcpp-debug
And as @tanis said, there’s currently an issue using it on Mac/Windows that’s very close to being resolved: https://github.com/jcward/vscode-hxcpp-debug/issues/25
And while this project is entirely about a Visual Studio Code plugin – there is the side benefit that people are working with the hxcpp-debugger, and making it more stable and working in more places. 
We’ll announce via various channels (repo, Twitter, haxe roundup, here, etc) when the PRs are in place and it’s ready to be used. Cheers!