StorageMojo » So Mr. Tucci, Where Are EMC's Google Application Notes?:

You know, that's a very good question - and not just about storage. Most uber-something (large, fast, new, shiney, whatever) installations, we hear at least something from the major vendors that are involved. Regarding Google, we hear nothing.

Gotta wonder what they're storing that estimated 20,000 TB with, don't you?