This looks interesting.
Jawbone Jambox: Little Bluetooth Box, Big Sound - PCWorld
http://www.youtube.com/watch?v=XgC3zjNH1oU
Jawbone Jambox: Little Bluetooth Box, Big Sound - PCWorld
http://www.youtube.com/watch?v=XgC3zjNH1oU
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
That is really cool, though I have ability to plug my Evo in using the 3.5mm jack in most places I go. If not, I have a bluetooth adaptor that makes any speakers bluetooth capable and no sound quality is lost...only paid $20 for it on Woot.com.....and its almost as small as a bluetooth earpiece, so traveling with it is super easy.
Now dont get me wrong, this thing is super cool. If I was rich I would buy one just for the heck of it. But I'm not so I gotta spend my money wisely, and my $20 adaptor gets the job done....not to mention makes my full surround sount setup with 12" sub in my living room is playing music from my Evo wirelessly. Now that is cool!!

here is another possible option -
Brookstone Outdoor Wireless Speaker and Dock
Outdoor Wireless Speaker and Dock at Brookstone. Buy Now!
has anyone tried it?
Unless there was a huge improvement over the Jambox for the minor price difference and bluetooth convenience I'd go the the Jambox.