The stable release Wine one.4 is now obtainable.
This release represents twenty months of development work & over 16,000 individual changes. The main highlights are the new DIB graphics engine, a redesigned audio stack, & full support for bidirectional text & character shaping.
It also contains plenty of improvements across the board, as well as support for plenty of new applications, notably Microsoft Office 2010. See the release notes below for a summary of the major changes.
You can download it from here: download wine 1.4