Allison Joseph offers a fine service over at Yahoo Groups for those interested: she moderates a listserv devoted to announcing current creative writing opportunities, such as contests, calls for submission, fellowships, etc. The list is on hiatus at the moment and will restart in early January, but if you're interested, visit this link.
I've been a member for a month or two (thanks to Wade, who showed it to me). But local writer Cliff Garstang, posted a reminder to join over at his blog, so I figured I'd follow his lead. He also does an interesting analysis of the Pushcart Prize, which is worth a look here.