The WWW and increased postal rates make life ever harder for paper magazines. "Smiths Knoll" has published its 50th and final issue of poetry. An article is on Anthony Wilson's blog. There are poems I write that will now have no home.
But online magazines, some of which have been around for years, are falling away too. Keeping a magazine going is a slog, and even if there are no publication costs, online magazines use up as much editor-time as paper ones. Duotrope says that "Horizon Review" is permanently closed. The Flash outlets "Quickfiction", "Flashquake" and "elimae" (started in 1996?) all seem to be closing after lifetimes of years. "Fiction at Work" has gone too. And as Matt Merritt reported, "Umbrella" is closing after 6 years.