1. Have you heard of either of these free services?
No - I use my DLNA certified phone to push/play music from my computer.
2. How do you currently play music from your computer on your home audio system? (Please detail your set up: Aperion Home Audio Link (HAL), Sonos, Squeezebox, Roku etc.)
I use a HTPC hooked up to my receiver for all computer based music. The music is stored on an external hard drive in another room, I mostly stream FLAC files w/MediaMonkey.
3. Would you be interested in a powered speaker that you could plug into any AC outlet and then play music from your personal collection via your computer without any other components?
* If yes, where you would use such a speaker (bedroom, bathroom outdoors, kitchen etc.)?
* What controls that you would expect this speaker to have (power, volume, etc.)?
Yes, I could see several uses for this, outdoors would likely be a prime example, perhaps Kitchen indoors. The speaker would need a smooth GUI, ability to play FLAC, volume, power. Remote would be nice as well. Touchscreen or physical controls, either one is sufficient.
4. Do you currently own a smart phone? (iPhone or Android device?)
Yes to a smart phone (Nokia E72), happy to say no to iPhone or Android.