We use Rackspace for our hosting services.
They are an SSAE 18 (SOC1 / SOC2 / SOC3) audited data center. SSAE 18 is the authoritative auditing standard and means that they have been through an in-depth audit of their data centers' privacy and security. This standard was developed by the American Institute of Certified Public Accountants (AICPA). It demonstrates that they have adequate controls and safeguards when they host or process data belonging to their customers.
For more information on security at Rackspace please see:
http://www.rackspace.com/security/For Rackspace SOC certification please see:
https://www.rackspace.com/compliance/soc/
