As of right now BAR ends at 2005 in Logos and the Biblical Archaeology Society has plans to release their own digital version of their magazine (see http://store.bib-arch.org/specials.asp)
I have called and emailed BAS, but apparently they still feel this is the best decision.
I don't know how a product makes its way to the prepubs, but maybe if the support exceeds the cost they will be willing to release in Logos as well (I know it's wishful thinking).
How can we get Biblical Archaeology Review on Prepub?
What can we do?