The Duplex Planet has subsequently found larger audiences in other forms — which are all derived from the original template — including book collections, spoken-word recordings, and a series of concerts.

"[1] In this unexpected setting, Greenberger found an unusual medium and a desire to portray the people he met as living human beings instead of "just repositories of their memories or the wisdom of the ages.

They include: A series of CDs titled Lyrics by Ernest Noyes Brookings (1989–present) continues to be issued, featuring a wide variety of notable musical acts (XTC, Brave Combo, Morphine, Ben Vaughn, Peter Holsapple, The Young Fresh Fellows, Robyn Hitchcock, Dave Alvin, Yo La Tengo and over a hundred others) performing songs set to the poems of Duplex Planet regular Brookings.

1001 Real Apes (2006), a theatrical presentation, features monologues drawn from the pages of The Duplex Planet, with music composed and performed by the critically acclaimed instrumental ensemble Birdsongs of the Mesozoic.

Shortly thereafter, Clowes' publisher Fantagraphics Books began publishing Duplex Planet Illustrated, a comic book featuring adaptations of Duplex Planet material drawn by a variety of alternative comics artists, including Peter Bagge, Drew Friedman, Dan Clowes, Jim Woodring, Chris Ware, and James Kochalka.