Eric Zorn of the Chicago Tribue ran a fantastic column this morning on the Amazon Unbox service, DRM and our Day of Action:

Amazon's Unbox program is going to run in the background on
your computer and send information back to the company about your
"operating system, software, amount of available disk space and Internet
connectivity" as well as what you're doing with those videos, all in
order to continue to "manage rights" associated with them, says the
agreement.