From the most recent SANS NewBites, thought this was particularly interesting and thought I'd pass it on.
There's still something to be said for the hammer method of drive disposal it seems.
--Erasing Data on SSDs Proves Difficult
(February 28, 2011)
A study published by researchers at the University of California at San
Diego says that it is more difficult to erase data from solid state
drives (SSDs) than from hard disk drives (HDDs). On some SSDs,
overwriting the data several times can make it inaccessible, but some
techniques proved more successful than others. Techniques for
sanitizing hard drives may not work well on SSDs because their internal
architecture is so different. Cryptographic erasure, which involves
encrypting the device so that users must provide a password to use it,
and when the device is ready to be retired, deleting the cryptographic
keys on the SSD, appears to be quite effective.
[Editor's Note (Honan): It should be noted that the report highlights
the same issue with sanitizing data on USB keys. Yet another reason to
ensure that any data copied onto USB devices are properly encrypted.]