The drawback of most hosted services like this is you can't see things on private networks, like localhost or a corporate intranet. We have an OS X native app to circumvent this and a Windows version is coming soon.
We'll try to answer any questions you might have, thanks for checking it out!
It's an old fix to what I perceive as a non-problem [0]. When a user turns their iPhone to view it on Landscape - the site won't resize without that viewport meta tag being there.
Not sure if it's been fixed. Even if it hasn't, I question the amount of people who browse on their phones in Landscape.
[0] http://webdesignerwall.com/tutorials/iphone-safari-viewport-...
E:
I'm running under the assumption that you might not be the dev and that the dev may have added it there intentionally to fix the landscape bug. This post has the wrong tone without it being read more explanatory, so I felt this clarification necessary.