I have to say I have been impressed overall with Roku. I did a couple of quick scans on my own Roku and didn’t find anything obvious to break open (unlike many other embedded devices). For it to take this long for a group to get into it, shows they built a good secure product.
http://www.engadget.com/2013/12/28/roku-2-roku-3-rooted/?ncid=rss_truncated