+1 for Squeezebox. Nothing similar right now, but rumor is there is a replacement in the pipeline. Hard to believe Logitech killed off the Squeezebox, easily the best and most convenient streamer on the market. My suggestion would be to pick one up from Ebay. Either the touch or the classic, the best control is your android/iDevice.
There are solutions for FLAC support in WMP though, google for solutions. There is also DLNA support in the Pioneer. While less friendly than a full music manager like squeezebox it is an alternative.