I have a hw6955 and version voice command 1.6 and I've tried the hack (which starts vc1.6 when the headset button is pushed) that's been used on other wm5 devices and it doesn't work.
Voice command 1.6 is great and I still use it, I've assigned the side button to start vc 1.6.
Trouble is, the device turns off after a few minutes anyways and it seems to lose connection to my BT headset. You have to turn the device on and then press the side button to start vc. If a call comes in, I have to press the button on the headset to reconnect to the device anyways. Not sure if this is normal, because hardly anyone has sables.
Could pressing the button on a headset, turn the device back on and start voice command? That would be awesome. Anyways, the 6955 is a great device, just needs a few more people hacking for it.
1500 and 3000ma batteries for out for it, the 300 gives 4 days of use, which is amazing. The 1500 provides 25% more power then the OEM battery and is the same form factor (and weight).