I use netflix as well. I've been using them for about 4 months now and am happy with their service. All of their plans give you unlimited rentals with no late fees for a flat monthly fee. Their basic plan lets you have up to 4 movies out at one time for $19.95 per month. Their cheapest plan lets you have 2 movies out at one time for $11.95 per month (I recently switched to this plan). Their highest plan lets you have 8 dvds out at one time for I believe $24.95 per month.
If you don't want to join the netflix program there is also dvdovernight.com where you can rent dvds for $3 a piece and keep them a week. Plus every 8th movie you rent is free. There are no monthly commitments with dvdovernight.
I've found that dvdtalk.com tends to be the best place for information on DVDs. Coupons, reviews, everything.
-= Kelly
1.
http://www.netflix.com/
2.
http://www.dvdovernight.com/
3.
http://www.dvdtalk.com/