Thanks! You can submit any song from Soundcloud at the moment (they can be yours if you'd like), and we'll be adding more sources soon. We'll work on making the submit form more clear, good feedback.
So, in conclusion, you need to make the Hot/New link stand out more.
EDIT: I'll tell you what happened: the Hot/New page doesn't touch the history stack, so when I hit refresh, expecting to be in the same place, my track had vanished.
Ironically of course the refresh was probably pointless, everything's all websockets these days.