Windows 10 Mobile preview users can download and install new versions of the Office suite of apps from the Windows Store. However, these new versions appear to be just minor updates with no change log and no noticable changes or additions.
At the moment, all we know is that the build numbers for these apps have changed from from 10042 to 10062. If you do notice any major additions or changes in the Office apps, please let us know in the comments and we will update this post if needed.
Thanks to everyone for the tips!