I'm going to assume that the OP was hoping to find someone who knows something from personal experience, rather than what he could find on Google.
On the other hand, I think he's likely to be frustrated in that hope, as the links all say the product is set to debut in "late 2011." In techware-talk, of course, it's possible that might really mean mid-2012 ... the likelihood that it means March 2011 is pretty slim.
It looks like they're basically a smart phone without the ability to work as a phone. They apparently will have Wi-Fi, though. I guess they're aimed to people who want to use them at home, linked to their Wi-Fi, in order to listen to Pandora, or use Skype, or listen to whatever saved or streaming media they're accessing with their computer. The lack of a cell connection makes them kind of iffy as a mobile device, though so long as you've got a free Wi-Fi connection you could do that ... so if you see people sitting around at Starbucks looking like pilots, you'll have these guys to thank. It wouldn't necessarily be such a bad thing to add a phone connection: if you saw a person strolling by and jabbering with a big headset on, it'd be less odd than seeing him with an invisible blue-tooth earpiece seemingly talking to himself.