If you are interested in ancient metals David A Scott provides a great opportunity to get into this topic. His book Metallography and Microstructure of Ancient and Historic Metals can be used as basic literature for beginners as well as reference book. However the best part is, at least in my point of view, that he allows free access to it. The .pdf file could be found here.
Just found this incredible list of Archaeology Blogs. I think there are some interesting topics for everyone. I might start a list on this blog too, but until then I recommend having a look at Doug’s.
I have added a new page on which I collect events concerning archaeometallurgy. You can access it through the top menue or this link.