I haven't noticed any new DC Archive editions of Golden Age material in many months (with the possible exception of Spirit stuff), and I'm always on the lookout for that stuff. They were doing a new GA volume of SOMETHING nearly every month for awhile there.
However, slightly offtopic -- someone on the Ditko/Kirby yahoo group pointed out something I know many of us have long been waiting for -- there's a reprint volume of the Simon & Kirby Sandman stuff on Amazon now, labeled as being available around June 2009.
Based on the price of that, it's not an Archive (cheaper I think), but in any case I'm hoping this means they've decided what they're doing and getting back into collecting their GA material again.