I haven't seen mention of his passing here, although I may have missed it. Wallace was an amazing writer, although his style was pretty far from the mainstream (as you'll notice if you read anything he's done)

Here is a list of work that he had published in Harpers:http://www.harpers.org/#hbc-90003557

If you haven't read him, I recommend this piece to start with:http://www.harpers.org/media/pdf/dfw...01-0007859.pdf