The various postings on grey literature have been highly interesting and informative. I don't know whether it comes within the definition (such as it is) but I find regular reading of news magazines an extremely useful current awareness sources, as well as a treasure trove of all sorts of information about interesting developments in the law. Presiding over a major academic law library (and its acquisitions budget) gives me an advantage here in terms of the range of titles we can sunscribe to (and to me in that I get them routed to me first for subway reading) however I'd recommend the following as being particularly valuable: McLeans (of course, it's Canadian), the New Yorker (for the marvellous indepth articles like the recent one on Wikipedia as well as the great cartoons), The Spectator (from the UK) and The Bulletin (from Australia – I'm biased of course but it is a wonderful publication). Also the various major book review publications which review law and government-related titles on occasion (and I often pick up something through these that I miss elsewhere. There are others of course, like the Atlantic Monthly and Harpers and doubtless others have personal favourites. It may not come under the heading of grey lit, but its great lit and a great way to keep informed.