Just announced on the LightSwitch Team Blog, the HTML Client Preview is now available for MSDN subscribers and will be available to the rest of the world on Thursday. Check out the LightSwitch Developer Center for the download, videos and articles:
Since we announced the HTML client a couple weeks ago, the community has been very anxious to try out the bits (understandably!) so I’m super excited that the release is available today. Please keep up the great conversations and provide us feedback in the LightSwitch HTML Client forum.
And keep an eye on the LightSwitch Developer Center for more information, videos, articles, etc. as they become available.