Grab most popular tags based upon URL stored in a node

Use the delicious json feed to grab the top tags associated with a URL stored in a node and add those tags to the node's taxonomy?

For example for drupal.org: http://del.icio.us/url/19ea799432123b7124cb6085bae90217?settagview=list

The json feed is: http://del.icio.us/feeds/json/url/data?hash=19ea799432123b7124cb6085bae9...

and returns:
[{"hash":"19ea799432123b7124cb6085bae90217","title":"drupal.org | Community plumbing","url":"http:\/\/www.drupal.org\/","total_posts":"13022","top_tags":{"cms":7671,"opensource":5027,"drupal":4409,"php":3211,"software":3096,"web":2454,
"webdesign":2167,"blog":1488,"web2.0":589,"development":583}}]

I have a CCK Link with a different URL in a large number of nodes and I thought this would be a great way to quickly autotag nodes.

I am also not sure if it is against delicious' Terms of Use as well.