Short of that, however, and in honor of his birthday, I've posted this clip from "The Simpsons." It's Pynchon's voice, but that's all we know.
An earlier appearance had Pynchon standing on the street inviting folks to stop and have their picture made with a reclusive author. Video isn't available, but this picture -- for those who know how reclusive this guy really is -- is good for some chuckles (sound clip was available at one point, and I'm trying to find again).

Summary of this first episode, written by Erik Ketzan and posted at TheModernWord.com: After Marge finishes her novel back at home, she finds a publisher who decides that it needs some glowing reviews by famous novelists. Enter Thomas Pynchon, cartoon character. Wearing a paper bag over his head (Pynchon may have broken his silence, but we still have to guess what he looks like now by mentally ageing his high school portrait fifty years), he stands next to a flashing sign, reading, “Thomas Pynchon’s house,” pointing. . . at his house, presumably. On the phone with Marge’s publisher, he says “Here’s your quote. Thomas Pynchon loved this book. Almost as much as he loves cameras,” a reference indicating, with sly sarcasm, that Marge’s book, well, sucks. He hangs up the phone, dons a waffle-board sign reading “Thomas Pynchon” (with a big red arrow pointing up at his head), and yells at passing motorists, “Hey, over here, have your picture taken with a reclusive author! Today only, we’ll throw in a free autograph. But, wait! There’s more!”