Just a note, I seem to recall reading echo is not treated like a function and so will not work with brackets when more than one parameter is passed to it. Whether that means concatonated variables, or variables split with a delimiter of some sorts I don't know.
That's what I was missing. The \ was just a typo. Thanks guys, it's been a while since I've done anything with PHP. I guess I got too used to .net and it handling all of that "AJAX stuff" for me! I've used echo with multiple variables a lot before. Could this be a version issue? I've never had a problem with it.