I like the idea and you've got an interesting internal page, but your front page ("What if deploying your code...") is literally unusable on an iPhone and probably on other mobile platforms -- the button is not visible, nothing is clickable, and it can't be scrolled or resized. You might want to rethink that so as to capture the people who are browsing HN / TechCrunch / whatever while surfing on the bus on the go.
Sorry about this, a fix for this is coming too! From what I understand, we're not allowed to check in or "deploy" until the competition (judging) is complete, but its now on our list.
Thanks so much for your support!
Checking again, I see that there's a four or five pixel strip of red bottom center that is actually clickable, but it's not exactly obvious. Screenshot here: http://imgur.com/JWcaP
Thanks for the overwhelming response - making the front page of HackerNews unexpectedly. DeployButton was our entry to RailsRumble this year, and it's a solution we created because we wanted something like this for ourselves for our own startup, Lizi.
Over the next few weeks, we'll be updating a few key issues that have been raised in these comments, including the ones about security.
We don't immediately accept that enterprises will jump to use DeployButton, but for a series of smaller consultancies, the security features we will offer will be more than enough.
Thanks again for the support - Sometimes I wish there was a "Whoops, we're not ready for HackerNews yet, don't taze me bro" break-the-glass button that puts us back on after a month's time.