Those Redbox kiosks you see scattered all over the place are proving immensely popular, as evidenced by Redbox recently serving up its one billionth movie rental. It took six years for Redbox to reach the billion rental milestone.

"One billion rentals is an incredible milestone as Redbox has quickly become the local video store for millions of consumers nationwide," said Mitch Lowe, president, Redbox. "Our popularity is a testament to our customers' loyalty and our steadfast commitment to making movie rentals affordable and convenient for our consumers."

To celebrate the occasion, Redbox is giving its renters a free one-night movie rental throughout the month of September. All they have to do is enter their unique DVD code found on their Redbox rental at redbox.com/thanks to get the promo code.

There are now over 24,000 Redbox kiosks in the U.S. serving up more than 9.5 million rentals a week, including Blu-ray titles,.

If you thought that Redbox would charge a premium for Blu-ray rentals, you were right, but it still might be less than what you were anticipating. That is, unless you were anticipating $1.49. In that case, go ahead and shake an angry fist at Redbox for gouging you for a penny more than you were prepared for.

While nothing is written in stone just yet, Redbox president Mitch Lowe says that his kiosks will in all likelihood rent out Blu-ray flicks for $1.50 per night, which is just 50 cents more than the $1 fee for regular DVDs. You can expect Redbox to start stocking its kiosks with Blu-ray titles within the next few months, Lowe added.

According to Lowe, nearly 17 percent of Redbox customers own a Blu-ray player. By adding Blu-rays to the mix, Lowe says Redbox's 23 percent share of the market could help drive Blu-ray adoption, especially with consumer awareness of Redbox checking at 72 percent in April, compared to just 17 percent in February 2009.