These are links to Academic Coin Blogs that focus primarily on Greco-Roman Antiquity:
Coin Archaeology – News and Discussion on Greek and Roman Art, Archaeology, and Numismatics
Coins at Warwick – The work of Clare Rowan, who is writing the book that will follow on from mine in the same series.
Numismatic Antigua – A Spanish language blog with high quality posts and links to many other Numismatic blogs.
[I will add more as I find them. Again, like the digital resources, these are primarily here so I don’t forget to check them periodically.]