Yup, if your biggest fear is about the people you're working with, you're in the wrong place. I'd hope that most people are better off worrying about whether all those stock options are going to be worth anything at all.
I'm with you--it's hard to put the idea of upside risk out of your mind. (What if you tell the world and the world loves you so much your server turns into a pile of slag?) But try to put it out of your mind anyway.
You need a landing page that helps your target customers know that they're in the right place. That's a sentence or two that explains the problem you solve and how you solve it. It looks like you want attention from developers. I think a lot of developers would like to get a feel for the API without registering. (I went to the "developers" tab thinking I might be able to give you specific feature-related feedback.)
With that done, I'd think you don't need or want attention from the whole world. For a first round of feedback, 5-10 like-minded friends would do fine. If they're really friends, then they'll have encouraging words for you, but look for common points of confusion or concern. After that it's a matter of refining your message and finding wider and wider circles for gathering input.
This makes it sound like the world would be better off if there was less shoddy software. I don't agree. I like a world where lots of people try lots of different things. Many of those people aren't ever going to produce things that rise above "shoddy." But every now and then somebody in the "shoddy" camp is going to do something brilliant. More power to 'em.
There are security vulnerabilities in every interesting product out there. The way a company responds to a vulnerability report is much more telling than the vulnerability itself.
It doesn't look like Eric notified Egnyte before he told the world about the vuln. Not nice.