Might I further suggest that this could even be a regular thing...a monthly guest publication? Announced on the subs board a month in advance?
Next publication theme announced on August 1st, spend that month subbing candidate articles, goes up on September 1st, etc...
September : "Arson About"
October : "Hands Up!" - the Magazine for British Hand Models
November : "The Wasp Buzz" - Wasp news for wasps and the women who love them.
etc...(I'm not necessarily putting these forward for suggestion, just examples - unless everyone likes them)
Candidate publication ideas could also be generated by the combined comedic intellect of "The Forum"
The magazine format then gives us the freedom to do Horoscopes, problem pages, reviews what-not that Guidelines for contributors calls for, and Doctor Moptop was pushing for a week or two back...
"Longer non-news ideas are welcome; spoof reviews, columnists, letters, horoscopes etc. all could make a welcome addition to the embryonic features section."