He would have been 50 today.
Here are some good things to read:
A letter from Wallace to Don DeLillo on Letters of Note
46 Things to Read and See for David Foster Wallace’s 50th Birthday by Carrie Frye at The Awl
Clips from a long 2003 interview, and links to the full exchange
Flavorwire: Tattoos inspired by David Foster Wallace
Galleycat: Seven Books that Inspired David Foster Wallace that You Can Get as Free eBooks