Nyko's site didn't list it as available yet, and Gamestop said they might have it. Turns out that had one, score!
The sensor bar comes in a plastic tube that contains the bar, 4 AA batteries, and some minimal instructions. What do you need to know? You put the batteries in and turn it on. I think it's nice that they include the batteries but I'm planning on using rechargables after those die.
On the back is a switch to select the alarm to shut it off. You can select between Off, 1 hour, and 2 hours. When the alarm goes off the bar beeps until you press the power button. I suppose it would eventually turn itself off but I didn't feel like listening to it anymore after what seemed like 30 seconds. Pressing the power button when the alarm is going off resets the alarm for another alarm period.
So does it work for the extended range as advertised? Well, the room it's in is 20 feet and it worked fine to the 20 foot mark so I think their claim is probably correct. It won't make the hand rotate any more smoothly at any reasonable distance. It might work better close up, I didn't try it. The hand seems more jittery at the back of the room, but I was able to type URLs into the browser with no problems at all so it doesn't seem to be that bad.
Pros:
* Works at least 20 feet away from the bar
* Not tied to the Wii
* Comes with batteries
Cons (minor things that wouldn't stop me from getting it again):
* Turning it off requires several seconds holding down the pwoer button. Why? it's not like it takes a long time to turn on.
* The power light on the front is very bright and can be distracting
* Bigger than Nintendo's bar
If you have a projector or a large room this will work for you.