Would be good if OEmbed api includes information about thumbnails

Hi, RedditPics Here... making another lib for Ruby and found out that your OEmbed info doesn't provide the thumbnail link... would be awesome to do it, so I can use the OEmbed API.

http://www.oembed.com/#section2 Response parameters 2.3.4

thumbnail_url (optional)

A URL to a thumbnail image representing the resource. The thumbnail must respect any maxwidth and maxheightparameters. If this paramater is present, thumbnail_width and thumbnail_height must also be present.