Shouldn't we check in http://i7lp.integral7.com/sun ? I am also in the same situation and checking this link as per the instruction from prometric center. Just clarify, if I am looking at the wrong place.
They do warn that it takes four to eight weeks for results to get back to you, depending on the grader. My case (four months) was a bit on the odd side, but that's something that's bound to happen with a human-graded exam.
If you really are antsy and it's not showing up on the assignment submission site, contact Prometric and inquire.
Theodore Jonathan Casser
SCJP/SCSNI/SCBCD/SCWCD/SCDJWS/SCMAD/SCEA/MCTS/MCPD... and so many more letters than you can shake a stick at!