So I did some checking around and here is what I found out:
1 - The SNAC Trial is in fact something you will need to request from Symantec Sales or your Reseller will be able to assist you with obtaining a Trial.
2 - Even though this is a moot point, I also noticed that the license file you receive from the Trialware site when downloading SPS gives you an .slf for SPS 3.0 which is the prior version. A request has been made to get this updated to SPS 4.0 which should happen in about a week.