Toshiba announced today it is launching a social business network called eXCHANGE, aimed at connecting its sales, service, administrative and corporate employees in the U.S.

Toshiba says eXCHANGE is similar to other social networks, such as Facebook, LinkedIN or MySpace and it will offer members an online forum to share and seek information, including best sales practices, user generated information and product tips.

After Toshiba announced that it will end production of its HD DVD players, Amazon.com says it will more prominently promote Blu-ray hardware and software on its Web site.

Toshiba announced an end to its HD DVD business, leaving the high-definition DVD market to Sony and its Blu-Ray format.

Wal-Mart said today that it will only sell high definition DVDs in the Blu-ray format joining ranks with several other companies and movie studios.

The retailer is following in the footsteps of Best Buy, Netflix, Warner Bros. Studio, 20th Century Fox, Walt Disney Co and Lions Gate Entertainment.

Toshiba says that discount retailer Kmart will only sell Toshiba HD DVD players and will not offer Blu-ray players.

Today, Memory-Tech Corporation and Toshiba Corporation unveiled a single-sided, three-layer ROM disc for high capacity storage and playback on both DVD and HD DVD formats.

In what comes as no surprise to anyone who looked closely, the much-hyped Microsoft Zune portable media device is pretty much a Toshiba Gigabeat S with added Wifi, a new OS, and different buttons.

With new developments in the mobile market happening almost continuously, I thought it was worthwhile to visit some of the recent highlights.