Mine came with a sleeve. Some might call it that. I actually ordered a sleeve from Dell, but it is not really needed. The padding is not a good as the one I got though.
Now I have two. I got mine from the outlet.
Mine came with a sleeve, ordered it several months ago. I am very particular to my laptop gear and bags/accessories... I like nice things, and probably would have ordered a sleeve from Tumi or Coach. but the sleeve that came with the M1330 is more than fine.