we are close to private beta release of joinbox, a sweet website that unites social actions, emails and online news. I have made a trailer which gets insight into the service: http://joinbox.com
We are now considering how we could promote it. Do you think, it has viral potential? If so, does it make any sense to give it a small spin with something like (chargeable) buzzfeed boost?
The video is very well produced, but feels a tad long before it gets to your sales pitch. Lots of facts before the pitch, which could be consolidated/shortened. Not sure if that's enough to make it viral, but it's a start to clarifying your pitch to site visitors at least :)
Also, it seems like everyone has their own personal way of organizing and handling their email. (labels, categories, archiving, skipping emails, etc). It seems like your system would mess with that.
Maybe try using http://launchrock.com for beta signups.. that in conjunction with the video may boost signups.