Wine 1.4-rc4 was released this Friday as the latest weekly release candidate for the forthcoming 1.4 release. Being in a code freeze, there's only bug-fixes going into these updates.
For reference, Wine 1.2 had seven release candidates before it went gold two years ago. A Wine 1.4 release in March jives with the articles that have been reported previously.
For a list of some of the prominent features of Wine 1.4, see this Phoronix article.
The Wine 1.4-rc4 announcement can be found on WineHQ.org.