For years, Amazon appeared to be a big pushover when it came to delivering Web entertainment.

During the early part of the Internet Age, Amazon shipped CDs and DVDs to customers who ordered them via the Web and CEO Jeff Bezos' company was synonymous with Web music and movies. Then Apple's iTunes, and Netflix, laid waste to physical discs by delivering digital downloads or streaming video and Amazon quietly drifted to the back of the pack.

But today Amazon flexed some muscle of its own by announcing it would stream movies for free to people who subscribe to the e-tailer's Prime service. Amazon Prime subscribers will be able to log on to the Web from Internet-connected devices to instantly access a pool of 5,000 films and TV shows. For $79 a year, Amazon Prime subscribers receive unlimited free two-day shipping without being required to meet any minimum-purchase requirements.

Plenty of commentators in the blogosphere are noting that Amazon's video service isn't a Netflix killer yet, and they're right--but this is just the merchant's first volley as it prepares to take on Netflix, Apple, and others in the growing streaming media sector.