Modal window capability to automatically pop up.
I would like to see the ability to have such a modal window pop up automatically after a certain period of seconds (that we can specify) for each unique visitor. Many sites use this feature to solicit an opt-in to an email list, etc. See http://www.jotform.com/help/203-How-to-Auto-popup-a-Lightbox-Form

Thanks for the idea!
We are actually currently working on this idea.
We are at the final planning stages and we should enter the development process very soon.