Squeezebox is probably the right way to go, especially for AAC DRM files.
However, for those with different priorities the Roku Soundbridge may be the right tool. Platform independent (can use any music server, including the SlimServer used by Squeezebox), and can play streaming WMA MP3 etc direct from Internet radio sites with just a wireless connection to an 802.11 access point - no PC (or iPod) required. Simple to use, even for the non-techies in the house. Infinite music: jazz, classical, rock, latin.
I used to connect a notebook or a PDA all the time to play Internet radio (using Screamer, nice lightweight client) but have found the Soundbridge to have the edge in convenience - it even looks good on the rack, and you can read the display across the room.
