Once a Revit model has been exported to a database, the things
that can now be done with it are limited only by your imagination.
Build web-based or stand-alone front ends to access and modify
your model—without knowledge of the Revit API. Bring existing
data into a database and join it with the Revit model.
In this article he discusses some of the potential connections between MS Access and MS Excel, and the benefits of such interoperability.
I have posted numerous times about how to view the Revit database using various methods. To start with, perhaps you would be interested in this post:
What Revit Wants: HOW-TO View the Revit Database (2011 Secret #14)
And, yeah, I twisted the title of this post a little bit :-)