Wired are reporting that a new Sonic Underground DVD volume 1 is now available containing the first 20 episodes and with new extra’s like a Greatest Hits cd, a music video jukebox and concept art.
A search on Amazon.com finds a Sonic Underground DVD released Dec 18th 2007, no specific releated info to the article is there though but with the release date it’s most likely the one.
Amazon.co.uk finds nothing new.