T-Mobile will be launching the handset June 21 on all channels, and, yes, it looks exactly like the international version on the carrier's sign-up page, so we can chalk that weird hue that was supposed to replace the Pebble Blue cover to bad video lighting.
Ceramic White and Metallic Blue, so the jury is still out until we actually see one.
More importantly, the Galaxy S III for T-Mobile is indeed going to be stuffed with 2GB of RAM, as recently announced by Samsung. The rest of the specs are 1.5GHz dual-core Snapdragon S4 processor, 4.8" Super AMOLED display, and 42Mbps HSDPA radio, so it will take advantage of everything T-Mobile's network has to offer. As for price - no info is given in T-Mobile's press release just yet, but we'd wager to guess it won't differ from Sprint and Verizon's models which pegged it at $199.99 for the 16GB, and just $250 for the 32GB version.