As "yet another" dual-mic, noise-canceling Bluetooth headset, iVoice's new Diamond-X ($99) is actually pretty cool, screening out ambient noise and promising to speak either the telephone numbers of your callers or their names if they've been stored in your iPhone's Contacts list. Despite the noise cancellation and voice prompting features, the headset promises 5.5 hours of talk time or 200 hours of standby. Packaged with a smart, flexible USB cable,…
