Keep an eye on http://wiki.winehq.org/MacOSX/QuartzDriver
Oh, that's awesome! How did I missed this.
And hopefully in the next few weeks we will have a newer patch in the winequartzdrv tree for a more recent version of Wine. I am not sure what design changes Emmanuel is wanting to make but hopefully they will be more to Alexandre's liking and can eventually go in to normal winehq. If you want to work on quartzdrv with Emmanuel, send him an email to get an idea of what he needs and what the design will be, then apply for write access to http://repo.or.cz and I will add you to the winequartzdrv branch.
There're very neat Wine Mac builds made on http://www.kronenberg.org/darwine/ Do you have contact with the maintainer? I believe you can work out great Mac distro together especially once quartz is ready.
Cheers,