Cnet recently reported that Blueooth 2.2 could be released as early as mid 2009. Bluetooth 2.2 is expected to boost speed by 10x and 100x compared to Bluetooth 2.1 with EDR. To make it possible Bluetooth is taking advantage of WiFi and to get the 100x transfer speed increase, they will need to make use to UWB or Ultra wide band technology.

The new High Speed Bluetooth specification will work in conjunction with WLAN or USB for improved data rates, and will be known as Bluetooth 10x and Bluetooth 100x, respectively. Latest update at Cnet reveals that Bluetooth 10x will be used first, since a lot of handsets have Wi-Fi capabilities now.

The only concern I can think of is, if old Bluetooth hardwares are going to work on 2.2 version