I can has cheezburger makes me LOL. Srsly. Not sure what it all means? Read about lolcats, or read this, it’s very exciting. Linguistically. Plus there are buckets.
It kinda started with cat macros and lolcats, probably not these blogs specifically, but with the general idea, and grew from there. See also stuff on my cat and my cat hates you.
Oh, and somewhat related, there is now a disapproving rabbits blog! And of course, don’t forget cute overload…have you been there lately?