Before popping off for the weekend, we thought we'd toss this site out for your perusal: Internet Archaeology, which bills itself as "The first fully refereed e-journal for archaeology". We don't know if this is exactly true or not, but we recall when it first went live. The papers seem to be geared more toward archaeology and technology, but there are several more traditional topics scattered about ("The antler finds at Bilzingsleben, excavations 1969-1993", Issue 8).

And it's free.