Only one I've seen so far (though I haven't looked) is the
Altec Lancing M604. It's on
Amazon for $125.95 and of course it's on eBay already too.
I like the concept of a speaker dock, but I just don't personally have a use for one. At home I can play the songs through my PC, or stream them to my 360 and I use the Zune when I'm walking or travelling. My "office" is an airline flight deck, and I'm fairly certain setting up a speaker dock and cranking music and podcasts during flight would be frowned upon!
