I received this dock from eBay today:
http://www.ebay.com/itm/Black-Deskt...659841?pt=PDA_Accessories&hash=item2c6aefc681
First the good news. It was really cheap, and when I took the insert out my iPhone with a thin Seidio case fit perfectly. The Home button is completely unobstructed, and it's solid to use while in the dock.
It wasn't perfect, though. You need two hands to remove the phone for two reasons: 1) the plastic dock is very small and light, and 2) the tolerances of the built-in Lightning connector makes it a very tight fit. I was able to make it one-handed by using a large helping of QuakeHold, but it still doesn't release easily. I might try to sand down the connector to see if that helps.
Still torn between this dock and the "Schuttenworks" Acoustic Dock. I need two anyway so right now I'll use one of each until I find something better. This cheap Chinese one would be perfect for my needs if it just was a little easier to remove my phone from it.