edit: just called t-mobile. The rep I talked to sounded very suspicious of what I was trying to explain to him as if I was making this up. I hope I am just imagining this stupid dim LED.
He said I'd have to take it into the store to be examined before they would do anything, which is weird considering I ordered it online, and others are claiming to have requested replacements over the phone?
@yaddam205 posted in this androidcentral thread saying samsung knows about this issue and are addressing it in a firmware update. Can anyone else who has spoken to samsung confirm/deny this?