Leaving off the XML declaration is common because having it there causes IE6 to run in quirks mode. Although it's probably safe to say HN runs in quirks mode on all browsers.
This is true for Safari, Firefox, Opera and Internet Explorer browsers. Not providing a doctype whilst rendering text/html will make the browser render in quirksmode.
But, next week, I'll be starting a project to design a middleware system based on a LISP repl. The foundation will be written in C and assembly. The dynamic portion will follow Steele's CL standard, although it'll be able to compile select portions to machine code during runtime, if necessary.
Since LISP is equivalent to the parse tree, it'll provide the RPC IDL so programs written in Haskell can communicate with programs written in Erlang, all seamlessly across a cluster or grid with a parallelization mechanism based on the STM model.
The original comment made a joke that mentioned PHP. It got downvoted. I thought I would make a joke myself based on the idea that it got downvoted because it mentioned PHP.