Uncanny X-Men #245 reads like a parody comic, rather than a regular issue. This great comic has a host of ridiculous occurrences (near use of a 'Jean Bomb') and cameos (Boba Fett and E.T.).
It seems like a tongue-in-cheek one-off comic. I don't really remember any additional references to the events that occurred afterwards.
All that said, does that mean it is not canon? Did Australia get invaded by an alien horde including someone that looked like Jabba the Hutt?