Certainly there are still stealth mode startups out there. But, why?<p>HN has become an awesome resource to test the waters. Whether just throwing out and idea or submitting a web app, the community here always responds honestly and thoughtfully.<p>To me it seems the feedback you can obtain from the HN community out weighs the risk of some one stealing your idea.
I'm working at <a href="http://kiha.com/" rel="nofollow">http://kiha.com/</a> and we've been in stealth mode for well over a year. For us it's partly about working together with partners who want a big, coordinated launch. Personally I agree that stealth mode is overrated, but our investors and leaders feel it's worth it for us.
I see stealth-mode startups differently. They aren't to prevent "theft" of an idea. Instead, they're designed around using that first big opening to secure a position to grow from. Where general feedback may help, it would lessen this impact when the time did come.