While this site doesn't talk about The Bell Jar in detail, it gives a good introduction to Plath, her major poems, and even the text of an interview with Plath.
This site offers Plath's complete poetic works in alphabetical order.
This site, made and maintained by Plath scholar Peter K. Steinberg, has lots of information on Plath's life and work, as well as numerous photos.
A brief biography about Sylvia Plath, plus several of her most famous poems.
Gwyneth Paltrow plays Plath in this biopic about Sylvia Plath's life.
An Australian adaptation of the novel.
Plath reads one of her most famous poems, "Lady Lazarus."
This site has a photo gallery of important places in Plath's life, as well as book covers.