Help! What Should I Do About this Kitten?

Help me please! I was out on a walk this morning and I saw a little kitten! Pure black with eyes that are still a little blue (all cats are born with blue eyes, but around 3 weeks they begin to change color). She (again I'm mostly guessing here) was probably around 3-5 weeks old. I wonder whether the kitten belongs to anyone. If she does, I will *slaughter* the person for letting such a little kitten to run around just a few houses away from a busy street! Sure, the mother is there (she's a stray with no collar, like my tabby), but the first time I saw the kitten she almost strayed right into the street and the mother was now-where to be seen! Later I saw the two rolling around together. I swear, that kitten should be taken and adopted out to some family to reduce the stray and feral population. I would, *ahem*, gladly take the kitten in. My parents would say otherwise, unfortunately. But 2/3rds of stray kittens don't survive the first year! The odds of little Blackie surviving without a family are so small, I'm tempted to do something! As I've said, Blackie is pure black, but the mother is white and orange. On a funnier note, Kusy was quite frightened of this little black mewing furball. Seriously! I saw the mother and the kitten by the cat man's house, but I don't know whether he owns them or not. They don't have collars, obviously aren't fixed, so I have no clue. I am really tempted to do something to help the kitten's fate. Some driver won't even notice him and crunch over her.... or a coyote will catch her... or an owl.... or she will perish in the freezing nights to come. What should I do?

Also, do you remember the tabby cat I fed two days ago? I still haven't seen him by my house. I saw two cats that may have been him by the cat man's house. I wasn't close enough to see their eyes, though. Both looked suspiciously too fat and clean to be this particular cat.

So what should I do about this kitten? Take her in and keep her? Take her in and advertise a 'Found Kitten?' Let her stay out there and most likely die? I don't know whether the cat man owns her (or the momma cat), but she shouldn't be out there! Should I ask the cat man about the kitten? Help me, please!