No, this cat never belonged to a famous person, it's just famous (well, that depends on how to define famous) for sitting on the stairs outside the local newspaper i Västerås, VLT, and for having been kidnapped in the beginning of the nineties. He/She was later found again in a forest close to the city centre.
I paid it a visit last week (I was going to the small café "Kalle på Spången" in the house at the corner in the background) but none of the pictures were any good so I used an old one, from June 2006.
I met a copy in Gothenburg just a few weeks ago, inside AEC.
a note, added 070221
Today I found out that the cat is named "Jönssons katt", designed by Anders Jönsson, available at Svenskt Tenn for SEK5300:- - okidoki!