It's another double-header this weekend, but this time with ER. More info at http://www.autocross.com/er.
Saturday's race will be a mirror-cross, which I understand is like a Pro Solo, but without the light tree to start you. Sunday will be both mirror courses merged together. Someone else can chime in if they have more info. It sounds fun, so come on out.
No pre-reg, so you can just register at the site.