Step-by-step OpenJDK on OS X?

[Charles Oliver Nutter]

I've read through some of the backthreads and there's a lot of noise 
about getting OpenJDK to build, having this issue, applying that patch. 
I'm wondering what the bottom line is today:

- Is it possible to build OpenJDK on OS X right now? Which 
versions/branches/etc?
- Has anyone aggregated the instructions required to do so yet? I mostly 
got an older revision to build using Landon Fuller's walkthrough, but 
that's pretty dated now.

Is there a wiki for this where we could collaborate on a 
walkthrough/tutorial? I'm eager to get a build going so I can start 
contributing to MLVM without my Linux box or a Linux VM.

- Charlie