I know this is different (and probably not what you're asking!) but I've gone without work for about 8 working days (exc weekends) now, but its cos I'm also doing teaching, and with delivering a lecture, seminars and now marking, I'm starting to feel very frustrated, as my actual PhD is whithering on the vine. And while teaching is good experience etc, its not what I'm actually here for, and makes it all the more difficult when i do get back to my PhD, which will be some time next week....