At the bottom of this post, feast your eyes on a number of locations from Oblivion (including the entrance to The Shivering Isles). Set to the Oblivion soundtrack, the four-minute teaser provides an enticing look at Cyrodiil through the lens of the more recent Elder Scrolls RPG.
We don't yet have a release date for this expansive mod, but in an email modder Kyle Rebel told me, "Now that the base game is done we can focus on implementing the quests, voice acting and finish all the weapon and armor sets." That's a considerable amount of work still to do, but it's hard not to marvel at the progress that has already been made.
The Skyblivion team is also looking for volunteers to join the effort. If you're interested, you might want to pop them a tweet or join the forums at their website.