The Riders of Berk preview is today 7:30/6:30c! If you can't watch it, we will be covering it here as well. So after it airs, don't expect this post to be spoiler-free. Additionally, Disqus (our commenting system) has real-time updates, so you can talk about the show while it's happening.
There are also several people who are doing live streams of the event. You may be able to find them on the Riders of Berk tag on Tumblr.
If you have any questions, you can check out our sites (BlackRose108 and IcelandicEel) or comment below.
UPDATE 8/8: The full Riders of Berk preview video [mp4] taken a Cartoon Network server confirms that the premiere date will be September 4th!
SITE UPDATE: Check out our transcripts of "Dragon Academy" and "Viking for Hire." We also have full descriptions for both ("Dragon Academy", "Viking") and have updated the character and locations pages.
Read more for extra info.
Here are some more showings of Riders of Berk in case you missed the first one. (You can also find full episodes on YouTube if you look hard enough.)