We thought it might be useful to you guys to have one dedicated thread where you can check out all the launch details and specifics for each of the carriers that will be getting the SGS3. There are also a couple of important details that they all have in common. One is that they will all carry the Samsung Galaxy S III name. We will not have multiple strange and exotic named variants like we did with the SGS2. The other is that although some of the carrier's describe the colors differently, as in "Ceramic White" and "Metallic Blue", these are the exact same colors directly from Samsung, but for some reason, those particular carriers are calling them something different. Here's the skinny:

Verizon:
Phone coming July 10th.
It will come in a 16GB variety for $200, and a 32Gb variety for $250.
It will come in the "Marble White" or "Pebble Blue" color schemes.

Sprint:
Phone coming June 21st.
It will come in a 16GB variety for $200, and a 32Gb variety for $250.
It will come in the "Marble White" or "Pebble Blue" color schemes.

AT&T:
Phone Coming June 21st.
It will come in a 16GB variety for $200.
It will come in the "Marble White" or "Pebble Blue" color schemes, but also, AT&T will have an exclusive red version coming out later in the summer.

U.S. Cellular:
Coming sometime in July.
It will come in a 16GB variety for $200, and a 32Gb variety for $250. (although part of this is a $100 mail-in rebate)
It will come in the "Marble White" or "Pebble Blue" color schemes.

If you can think of any other details I left out, feel free to add them in the thread. Enjoy!

Source: S3Forums