Jimmy Akin is one of the Nat. Catholic Register's most knowledgeable columnists. There's a lot of links to Hildegard stuff in the combox comments.
Official trailer of VISION, a German movie about Hildegard. The trailer is kind of melodramatic/gonzo/cinematic (eh, it's a trailer, what do you expect?) --- but it does give emphasis to the mystical-prophetic aspect of her vocation
Hildegard's wonderful musical compositions:
A few images of her many visions.