Office 2010 beta was supposed to be released sometime next week. However, like always a copy of Office 2010 beta is already doing the rounds on the internet on torrent sites.
Office 2010 beta has several new features as compared to the Technical preview version. Craving Tech has posted some screenshots of the Office 2010 beta.
Manan has also posted an article which compares the changes between Office 2010 Technical Preview and Office 2010 Beta. You can check out his post to learn more about it.