Howdy, champion! Welcome to JavaRanch!
It's just that now you are able to take these other certifications. You are a
SCJP, so that's normal!
Now, here's what I did to receive the assignment: after I got the voucher to take the SCJD certification, I called Sun to say that I wanted to receive the assignment. They sent me an email where I informed some data. I replied, and then, I received an email, saying that my assignment was ready to be downloaded.
Cheers, Roberto Perillo
SCJP, SCWCD, SCJD, SCBCD