He hanged himself on Friday. It's a shame. You should give Infinite Jest a go - it's very funny, particularly the bit where the kids play a tennis-themed nuclear war simulation.
Online and much shorter, you can read Wallace's hesitating embrace of prescriptivism, an entry in the "Eats, Shoots & Leaves" genre that's nicely written, if not totally persuasive.
He was 46, very sad.