Anyone can join the wine development team. Simply subscribe to wine-devel and wine-patches and start hacking. Because all patches go through Alexandre before going into CVS every developer has basically equal chances of getting their patch into the tree (assuming that it is following the overall architecture goals of Wine). Actually, I would say wine is an extremely good example of the open source development process.
well, the problem is that sometimes some patches fall to nowhere - they're rejected without any note. this could be very annoying especially for newbies (who have the fair chance they'll not fit into wine architecture). i mean - we should have some mechanism which deadly indicates the state of the patch.
however, it's not the case now. they should really join.
martin