First, some old ones. One by Alberto Vargas:
Update 3/17/12: I've just receive a very gracious email from the actual artist of the picture below, who is not George Petty as I had thought, but rather Kent Steine. My apologies for the confusion.
One by Bill Randall:
And some more modern ones. Dave Stevens:
Can't quite read the name on the signature for this one..
And finally Elivra, Mistress of the Dark, as envisioned by Olivia de Bernardis:
My effusive thanks to The One and Only Wombat over at the The Other McCain, who acknowledged all my Rule 5 ramblings from last week in his weekly canonical Rule 5 compilation.