Have just received my new HTC Desire HD and I've been on a frantic look to find a speaker dock that can also charge my phone and as yet, they don't really exist ala all the millions of iPhone docks out there with cradles. However, I've just found this
E-Volve 3 dock on Amazon and it's a basic speaker dock with a usb output that also charge's any device (using your own cable), just plug the 3.5mm jack in and hey presto, it works great, and it's black too. Sound is good for the price as long as you're not interested in hi-Fi sound next to your bed. Read the customer reviews and you'll see a few HTC Desires being used with it. There are many versions availablebut I think that's to do with the cradles supplied, I bought the Sony Walkman version for my HTC HD.
Hope this helps anyone on the lookout for speakers with a charging ability.
Dave