The upgrade does work and the post is timely. The post was sent out 4/24/12 and if you read it states "For a limited time, any registered SkyDrive user *who has uploaded files to SkyDrive* as of April 22nd can opt in to keep 25GB of free storage while still getting all of the benefits of the new service." The free upgrade button will only appear if you have uploaded files prior to 4/22/12 onto SkyDrive. It worked for me. Thanks for the heads up on the free upgrade!
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