Purists should take special note of the maester's chain about Luwin's neck. Tom's is the most accurate visualization of the chain-of-many-metals I have seen to date. This is how I have always pictured these chains, and how I described them in my books. (though I should mention that Pycelle's chain is much grander, larger, and more ostentatious, him being the GRAND Maester and all).
Next up from Tom and Dark Sword: Young Robert at the Trident. Watch this space. (And Dark Sword's website).