http://www.gearslutz.com/board/new-product-alert/849933-my-new-book-recording-drums-complete-guide.html
That just came up on gearslutz, thought you might be interested
I hadn't heard of that in the wild. But a lot more bugs are caught by vendors than not. It certainly becomes much more of a full time job to patch every bug found individually. (And yes, this depends on more than just rooting, generally. It's the roms that get exploited. But I know you know all this.)
The big advantage to rooting your android phone is then you get to track every remote exploit and fix them yourself, instead of having to have your vendor do it as part of their job.