I'm in a reading group of men from my church, and we are going through Milton's Paradise Lost, taking turns reading it aloud to each other. This has been a great experience, not only because of the fellowship, but also to hear Milton's blank verse. The poetry just flows and it is a treat to listen to.
The copy of the poem I using is published by Barnes and Noble and has illustrations by William Blake in it. I was searching to find more of those and learn something about them and I stumbled on this great site devoted to William Blake: http://www.blakearchive.org/main.html. It's a hypermedia archive of Blake's works sponsored by the Library of Congress and a number of universities and humanities organizations.
I didn't find the illustrations I was looking for, but there's a bunch of them at this online archive to browse through. This is a fine example of the internet at it' s finest!! If you google "William Blake" you'll find other sites, but none as good as this one.
One site that does come close is the one by Britain's Tate Museum: http://www.tate.org.uk/britain/exhibitions/blakeinteractive/. The content of the Tate site is excellent, but they have "tarted up" the site with an over-abundance of hyperlinks, and it's hard to find a specific work or painting. But if you are in the mood to just do some idle browsing, this is worth the time.