Maybe Android's security is broken, and maybe not, but the premise of this article is FUD. The ability to install software from any place without "vetting" by incompetent middlemen like Apple is a feature, not a bug. Software for the BlackBerry is not vetted by anybody, and it can be installed from any web page, email message, or storage card. The BlackBerry store is optional, not a bottleneck. And yet no such security problems plague the BlackBerry platform, which is vastly more widespread than Android is.
So please, keep the blame on the technical side. Turning over control of your program to middlemen is not a security enhancement.