The previous beta release was Chrome 6.0.472.51, so the changes are minimal. There is however a big number of security fixes which have only now been revealed.
The first Chrome 6.0 beta was released less than a month ago. Work on Google Chrome 7.0 has started already and the first releases have landed in the dev channel.
Google intends to accelerate the development process and now plans to release a Chrome stable once every month and a half rather than once every three most like until now. So the Google Chrome 7.0 stable release should be coming very soon.
Google is also celebrating two years since the first Chrome beta landed.
Google Chrome for Windows is available for download here.
Google Chrome for Linux is available for download here.
Google Chrome for Mac is available for download here.