The replacement for Ambassador Kosh is named Ulkesh in Babylon 5 Canon, and previously appeared in War Without End: Part One (1996).
The writing on the Vorlon ship reads "John Teska". John Teska was the senior computer animator at the time.
Walkabout is an Australian term that refers to a "walking trip", an extended period during which an Australian aborigine goes wandering in the bush as a way of getting in touch with his aboriginal roots or a way of discovering new things.
Fans dubbed the new Vorlon ambassador Darth Kosh, in homage to Darth Vader.
The scene in which G'Kar has to explain to Na'Kal that he is eating Swedish Meatballs and not Breen (a Narn delicacy) is something of a running staple among science fiction shows, in that there are some universal dishes across species. Despite differing names, and perhaps some local ingredient changes among races, the dishes are virtually identical. For example, in Star Trek, a Bajoran dish known as Hasperat may be similar to a large (and often very spicy) Earth burrito. Except Hasperat is described as being prepared with a strong/sour "brine."