Email was just sent out today to say that the non-attendee sets have finally sold out, and that there are still so many "attendee boxsets" available, that they are looking at transferring more across to the non-attendee option.
Otherwise, they will sell the extra sets at the convention, and on their site after the convention.

We have run through our allotment of Iacon (non-attending sets) and are considering moving some of the Primus attending sets over to Iacon non-attending.

However, we don't want to do this until we are confident that everyone has registered that intends on coming to San Diego. So, we will re-visit the numbers in the next few days and make a decision as how to assist those who can't come but want the figure sets.