TechReviewSource reviewed the Office 2010 Technical Preview earlier this past summer and they liked what they saw. There isn't a whole lot of changes between the two, but just a few minor interface tweaks. Their new pictorial review of the beta 2 leaked version is build number 14.0.4514.1007, which is very close to the rumored 14.0.4514.1009 build that Microsoft will release within the next few days.