http://img148.imageshack.us/img148/6936/picture034py2.jpg
http://img145.imageshack.us/img145/6062/picture030xm7.jpg
http://tinypic.com/view.php?pic=iz2cma&s=4 just ignore all the stuffed toys in this one. The kid’s pictures are clearer than mine though. 
She’s very dark brown, almost black in unless in bright light, with a patch of white on the chest. She’s part lab, but has flatter head and triangular ears. Right now she’s about 20 lbs and 2.5- 3 months old.
Labrador mix?
The cute kind! What a doll. But “lab mix” is probably the best you’re going to get at this age. She might be more obvious when she’s older.
Chocolate Lab?
My guess as well, but the muzzle doesn’t look quite right. But puppies often look funny. 
Could have some Chesapeake Bay Retriever in there–or the muzzle shape might be due to a pit bull in the woodpile somewhere. Lab/pit mixes are really common for some reason.
Most definitely mostly Lab. I had a Chocolate Lab/Black Lab mix (100% Lab), and he looked almost identical to yours at the puppy age. That pic with the stuffed animals is adorable. Squeee!
Awwww, he looks almost exactly like my new puppy! He looks like a chocolate lab/pit mix. So cute!!
Pit would make sense, and explain shape of her head and muzzle.
She’s definitely part Lab, as I said in the OP. The mom is Lab, and the father is a mystery.
She is sort of cute though. Want her? Just kidding, but I’d forgotten how much of a handful puppies can be.
To me the head looks too round and the shoulders/chest a bit narrow to be pit. Pits tend toward thickishness.
Looks like a Chocolate Lab to me. Not all of them fit the breed “standard.”
Looks like a Chocolate Lab with a bit of Pit Bull (and a whole lot of cute).
She looks just like the hundreds of lab pups we’d get in the shelter. What a little cutie!
Moving thread from IMHO to General Questions.
Chocolate lab/sneaky neighbor dog mix.
Really? While there is a factual answer, we’ll never know for sure what that answer is. Not that I’m complaining.
Good point, Tupug. As far as I know, it was an accidental breeding*, so her parents might not have fit the standard.
Puppies look more or less alike. When she gets older the father’s input might be more apparent. Right now, ‘cute’ will have to do.
A couple years ago, my sister-in-law, once removed* got a rescue dog from the pound. He was touted as a Newfoundland Retriever / Labrador Retriever cross. When we saw Roy the first time, DesertRoomie and I said, “Newfie, yes (lookit the size of him!) but that’s no lab.” It took a few minutes’ pondering and then it struck us at the same time: Flatcoat Retriever. I was keying on the head shape, DR on the coat. We brought a dog breed encyclopedia the next time and there was no doubt; you could see both breeds’ characteristics in Roy.
*The sister of the wife of my brother.
I was going to say Chesapeake Bay Retriever as well. The are more stocky than labs, with a chunkier face
http://www.breederretriever.com/photopost/data/528/medium/chessie_2.jpg
However, the coat of a Chessie is different and notable from a brown Lab. If it comes in kind of rough and almost curlyish, I would think Chessie. If smooth and shiny, then Brown Lab/maybe pit bull cross.
Whozafuzzywuzzywiddlepuppydoggie?
Good god, don’t let supervenusfreak see this thread! We’ll have a puppy within the week…
the ears would suggest a terrier of some sort …