As LOLCats go, this one is pretty spesh. Schroedinger's LOLCat indeed.
Update: Rob sez, "That lolcat belongs to Kevin Steele of Mackerel fame!"
Update 2: Dan sez, "Just wanted to give you a link to the Flickr page of my lolcat, which gives due credit to those where credit is due."
LOLCODE: LOLCats meet programming
LOLPresidents photoshopping challenge
Where LOLCats come from
Massive cache of kittah pix (aka LOLcats, cat macros)
Pedantic overanalyzer sucks all the fun out of LOLcats
Pedantic overanalysis of LOLcats not pedantic enough, says blowhard
Cat macros hijacked by heartless homosexuals