It's "raid theapt day" here at Daddy Types. This sweet-looking Lacoste canvas messenger bag would make a decent, adaptable diaper/gear bag for any one as-is. If only it came with a matching Lacoste changing pad, and maybe a waterproof-lined pocket in it somewhere, it'd be perfect.
Of course, if it's too matchy with your or the kid's little alligator shirts, then it's your own fault.
Izod Lacoste canvas messenger bag with interior organizational pockets, $125 [neimanmarcus.com via theapt]