Well, I commented and the author, Tom Dignan, then contacted me by email. We exchanged a few emails and while we agreed on some points (i.e. that users not bothering to check app permissions when they install apps on Android is possibly the biggest risk), he seemed sceptical about some of my other points. Despite clearly explaining a number of known exploits which have even been demonstrated on the actual Android Market by security researchers, citing my sources and providing supporting links in my emails, and explaining how some of the exploits that exist can still be used today to root some G1s, he has stated he will not be approving my comment.
He didn't give any reason as to why he refused to approve my comment, nor did he challenge anything I said exactly, so I'm a little puzzled. Oh well.
Anyway, I'll post my comment below so that you guys can learn from it if you want...
Edit: He emailed me a second time asking if he could use some of the things I said in my comment in a later post. So all's well that ends well. I was a little peeved for a while.