Fans may enjoy a new podcast called Don DeLillo Should Win the Nobel Prize, which is run by Jeffrey Severs and Michael Streit. You can also find it via Instagram @delillopodcast. There are now nine episodes, coming about one per month.
The Don DeLillo Society was formed in 1999 and invites your participation. There is a Facebook page for the Don DeLillo Society, which lists events and news of interest. Also a devoted Don DeLillo Society website is still up, and includes an excellent guide to DeLillo literary criticism, and much other information of interest to DeLillo fans.
The New York Times has a nice collection of their reviews of DeLillo, along with links to articles by and about The Man. They also have this page which links to articles that mention DeLillo.
April 1, 2009: I've learned that a public-service minded individual going by the handle of the Donologist has been busy adding radio interview clips onto YouTube. Enjoy.