Why is Symantec selling the download version of NIS2010 more expensive than Amazon, who provides the CD version. Amazon sells NIS2010 for £37.49 (http://www.amazon.co.uk/Norton-Internet-Security-2010-Computers/dp/B002M787XG/ref=sr_1_2/277-9679090-4396259?ie=UTF8&s=software&qid=1256569219&sr=8-2), while Symantec is selling it for £49.99 (http://www.amazon.co.uk/Norton-Internet-Security-2010-Computers/dp/B002M787XG/ref=sr_1_2/277-9679090-4396259?ie=UTF8&s=software&qid=1256569219&sr=8-2)