Winelib apps have no direct dealings with the wineserver. However, our DLL interface is not that stable yet, that's why we're pushing to finish the DLL separation (Phase 1). Check out the 0.9 TODO! :)
This was what I was talking about. It MAY be possible for current winelib binarys to work with later WINE versions but it shouldnt be supported untill a 1.x branch is taged.