Around a month ago we released the first beta version of Qt Creator 2.1. We have not added any significant features since the first beta, and therefore, the Qt Creator 2.1 beta announcement is still a pretty good overview of what is new in Qt Creator 2.1.
After the release of beta 1, the translations into Russian, Polish, Japanese, French and German have been updated. Those translations are for the most part contributed by the community. Thank you! If you want to help translating, see Qt Localization in the gitorious wiki.
We think this beta is already very solid, and we are using it for our development.