Wolfe/Gaiman collaboration; other uncollected stories

Just heard: Gene and Neil Gaiman have collaborated on a chapbook, A WALKING TOUR OF THE SHAMBLES, for issue at the World Horror Convention. GW's only collaborative work ever? Other uncollected GW stories: "Viewpoint". Novella. REDSHIFT, ed Al Sarrantonio, Roc 2001. Fair. "Pocketsful of Diamonds". Novelette. STRANGE ATTRACTION, ed Ed Kramer. Bereshith 2000. Brilliant. "Shields of Mars". Short story. MARS PROBES, ed Pete Crowther. DAW 2002. Haven't read yet. --Nick Gevers.