I am an advanced database and vb programmer but recently my position
has called for advanced archtecture descisions enterprise-wide.
Although I have quite a bit of knowledge on designing relational and
normalized data structures I would like to further my knowledge on
large-scale distributed database design and maintenance.

Can anyone suggest a decent to good book covering some of the more
advanced topics of enterprise databases and distributed database
design?

The only one I've found so far that looks promising is:

Enterprise Architecture Planning: Developing a Blueprint for Data,
Applications, and Technology by Steven H. Spewak, Steven C. Hill

Thanks!
Jason