Recently, the InfoWarrior list sent me a notice of Seagate announcing a hard disk that offers full-time, whole disk encryption. For the right need, this seems a solid product that will perform better than software encryption. Here (2nd URL) is another article on that device.
I've always been concerned with rapid response time, so the current rush to encryption may cause it to be overused, with negative performance implications for most users.
This (3rd URL) article is solid in covering encryption and notes well the performance hit.
So much personal information has been carelessly lost and stored on laptops against company or government policy that it is beyond my comprehension that managements, regulators, and lawmakers have not taken effective action.
Then I find an article entitled "Laptop Encryption: Compliance without sacrificing performance, now that’s magic!" that is without merit.
This wasn't supposed to be about breaches of personal privacy and information loss, but here is the one that should scare anyone, Attrition.org Data Loss Archive and Database (DLDOS) at http://attrition.org/dataloss/
URL: http://news.com.com/Seagate+ships+hard+drives+with+encryption/2100-1029_3-61 66180.html