Yeah, n+1 is great. It's been around a few years, the editors are young (well my age, early thirties) and I don't think had much of a background before putting it out. The goal apparently is to do something like the leftist literary journals of the 1930s-50s. They seem to have an affinity with the London Review of Books. One of the n+1 editors had a pretty good essay in the LRB a couple weeks ago about Fredric Jameson:
http://www.lrb.co.uk/v32/n08/benjamin-kunkel/into-the-big-tent
Mike Beggs