Got an iPad or iPad2?
Then potentially you have a free(ish) streaming client. With the addition of the Apple Camera Connection Kit you can hook up your iPad to an Audiolab 8200CD or 8200CDQ via their USB input and not only play the music on the devise’s iPod feature (note: this doesn’t work with any iPhone or iPod as the CCK is not compatible…as yet anyway) but with the use of a UPnP client app (the best one I‘ve found is Plug Player (£2.99 from the App Store. There are some free ones but they're not so good), can be used to stream from a server, be it a computer or from a NAS drive with a built-in UPnP server, I use a Western Digital My-Book which has Twonky Media built in.
Once connected, one simply uses the Audiolab’s remote to change track, pause and stop.