Speaking as a Visor owner, can I be the first to raise my hand and say "What's the point?" Frankly, I just don't get it. First off, the thing is apparently going to retail for $269; as the article points out, that's more than the cost of the Visor itself. Second, if you have a Visor and you want a portable MP3 player, why would you choose one that sucks the juice out of your PDA?
Then there's the fact that the Visor is larger, heavier and more fragile than a plain old portable MP3 player. Speaking of which, Best Buy was recently selling a standalone portable 32MB MP3 player for a paltry fifty bucks; you can expand it to 64MB for the cost of a SmartMedia card, currently $56 on Pricewatch.
Perhaps I'm missing something here. Perhaps the article failed to mention some fantastic feature this thing has that requires the Visor and makes it worth the $163 premium. But I kinda doubt it.