The New Journal of Physics from IOP has an RSS feed broadcasting table of contents information. When you think about it, why wouldn't every journal do the same thing? If I follow a bunch of journals, wouldn't the publishers want me to know when new articles come out? Wouldn't I want to know when they come out without having to actively check somewhere (like the library, for example)? BTW, a quick and partial check tells me about half the IOP journals have feeds. via SciencePORT.org.