alphaWorks has released a tool for removing personal details from data.
The Online Stream Deviator is "a module that alters the data from incoming streams in order to hide the precise values while preserving statistical properties of the data." It lets the receiver analyze the trends in data yet lets the sender hide the real values of sensitive data.
This reminds me of Pattern: Data Obfuscator. Sounds like OSD obfuscates data in streams, not databases.
Online Stream Deviator