This lady demonstrating the use of Spindolyn is one...
Lynda from http://knittogetherkeepers.blogspot.com/
Astrid from http://fishwrapper.wordpress.com/Hanna from http://www.ihanna.nu/
And there are many other famous knitters if you get to think about it. Clara Parkes from Knitter's Review and the author of The Knitter's Book of Yarn, she mentioned she has a cat if I remember correctly.
Finally, it can't be more obvious than Laurie Perry (aka Crazy Aunt Purl), her 4 cats and her book --
So if you are a Cat Knitter and would want to show the photos of your cat(s) with your knitting, or rather how they have 'helped' your knitting, ahem...Please write to me and send over your 'evidence', we might be able to get a nice gallery out of it. Thanks!