Mainframe security - finally I found someone talking about my concerns on it

I was doing some research for references to include in an article that mentions "Mainframe insecurity". One of the reviewers of the article challenged some of my comments on mainframe security. I finally stopped after googleing for some minutes at Cat Slave Diary. The most interesting thing, for me, is that the author mentioned some of my main concerns on mainframe security, specially the connections with applications running on other platforms. You can find good posts here and here.