Can the Bluetooth® word mark be used in a web domain, such as www.bluetooth.se or www.bluetoothphones.com?

No. The Bluetooth word mark is a registered trademark and as such, it cannot be used in a domain name. The only exception to this rule is for the official website owned by the Bluetooth SIG - www.bluetooth.com.

An example of correct usage for the Bluetooth word mark in a URL is www.motorola.com/bluetooth.