Stanford University's Locke History Page - A great, extensive review of Locke's view and historical background.
Internet Encyclopedia of Philosophy Overview of John Locke - Another great resource for anything about John Locke's life and philosophy.
Lockes views on Liberty and Government Page - A page well worth checking out to get a bigger picture of Locke and his impact on society.
"Second Treatise of Government" by John Locke - A copy of his 1690 writtings. Would be a great resource for evidence.
A large collection of Locke's writtings - A nice and large selection of Locke's writings. Another great resource for case writing.