Big Island overview from Tripadvisor (including photos and videos)
Traveller Reviews from Tripadvisor
Tripadvisor traveller forum for VNP (tons of useful info from knowledgeable people here!)
Magazine article about visiting VNP
Another one from Washington Post
Namakani Paio Cabins - a very basic, camping style experience (for $55 a cabin) right near the volcano. Here are the Tripadvisor guest reviews for them
Dolphin Bay Hotel - in Hilo itself, sounds interesting and one of the cheaper ones
Said to offer some of the Big Island's most gorgeous scenery. Includes attractions such as Akaka falls, Pepeekeo Scenic Drive and the Hawaii Tropical Botanical Garden. Here is a photo gallery:
Article in Frommers (includes links to the individual attractions listed above)
Click here for a 'clickable' map of the Big Island. This has some nice video tours of the various areas shown on the map