This deal has ended.
Through 6/15, Netflix is offering a Free One-Month Trial during their Friends and Family promotion. You'll likely need to enter your billing information and make a point to cancel after a month to avoid being charged for the following months, but this is essentially a free month of DVDs. Netflix has over 55,000 titles to choose from and most arrive within one business day. You can keep DVDs as long as you want and use their prepaid envelopes to return them.