Just a bit of info for those of you still on the fence about getting the world's first first-party wireless controller ...
Just picked up a WaveBird at Electronics Boutique less than an hour ago. For those of you concerned about the battery requirement, the WaveBird does come packed with two AA batteries ... enough for you to get 150 hours of gameplay and see if you'll like them.
I highly recommend that you invest in a couple of sets of rechargeable AA batteries (NiMH, rated at least 1600 MAh) and a charger. You can use the batteries in your WaveBird, GBA, digital camera, etc. It's just a smart thing to do, and a much better use of your time than bitching about needing more batteries.
The WaveBird comes packed in a plastic bubble pack, just like the regular controllers ... the velvet pouch was indeed an E3 exclusive.
So far, I've tested the controller only with one game, the just-released Wrestlemania X8 (full review coming soon), and it works flawlessly, even when talking on my 900MHz cordless phone, so no interference worries. If you DO happen to get interference, changing the channel on your WaveBird and receiver is easy and should clear up the problem.
And yes, the lack of cables is definitely making the controller less interesting to inquisitive Beagles.
More soon ...