Mary,
If you are looking for a copy of sb-100 I have one of it and also sb-1578. I don't remember a memo from the DMV being posted here and I can't find one either. If you want the DMV website it is--
www.dmv.ca.gov/vr/spcns.htm
That will tell you the steps and how many slots are still open. I think they update it weekly but won't say for sure.