Thanks for submitting this! I am the product manager for Broadsheet, and we just launched this public beta last week.
Broadsheet is a tool for people who need to build the type of beautiful, responsive pages that aren't easily made in common CMS tools. You can publish instantly to a hosted page, or export your Broadsheet as a .ZIP file and host it on your own site.
If you have any questions, please hit me with 'em!
Gratify