Netflix is raising subscription fees for new and existing subscribers as of September 1st, 2011. Unlimited streaming will now cost $7.99 a month. DVD rentals will also cost $7.99 a month. There is no combined rate for streaming and rentals; 1 DVD and unlimited streaming from Netflix will cost about $16 / month.
I personally will be dropping my DVD rental subscription and using only their streaming plan. Looking for alternatives to Netflix? See this CBS News article for a list of the 5 top alternatives to Netflix.