I asked this before but got no answers, maybe i have more luck now.
I have trial licenses for SnapManager software (Oracle, SQL, Exchange) to set up a lab but the download option for the software is not available on my NOW account, even though i can request trial licenses there
The reason for this could be the fact that NOW login for customers is activated only per purchase. That is what I think. If this does not work then please get in touch with the local NetApp Sales office.