The 4th beta release of GRASS GIS 7.0 is available for download. This is the last step before the planned release candidate (RC1), so a very good time to take it for a test run.
The most important changes in beta 4 are a major effort to standardize all parameter and flag names. This will bring a better and more consistent user experience. For more details and the download links, to to http://trac.osgeo.org/grass/wiki/Release/7.0.0beta-News