So forget about the security part, don't you think that such kind of app isn't what the Internet should be about? Accessing any info anywhere in the world? (and soon, from any device?) You might argue that with handheld devices, it is more and more easy to avoid those kind of apps. And I could agree with that. But can you easily share that information with someone else? I don't think so.
PS: I am one of the developer of OpenDesk.com, so one might think that my opinion is affected by that. I don't think we are trying to force people to use our apps, some people will have a use for it, some don't.