in reply to
what would you like to see in perl5.12?
Nested statement modifiers are reportedly rejected by Larry for Perl 6, so presumably ruled out of court for Perl5 as well. Poking around shows this thread about a year ago, with someone citing Larry rejecting them 5 years ago.
If indeed this is final, all I can say is "too bad". I think all the arguments against multiple statement modifiers apply equally to single statement modifiers. And you may call it "enough rope", but rope can be awfully handy at times. If I have time, I may dig up a couple of examples where I would have used them, and people can laugh at me.
Update: another couple of Perl 6 threads, from 2003: Statement modifiers, Statement modifiers (yes, again)