They haven't put it on their site yet, but on Sunday (17th June 2012) Aldi will be selling a Bluetooth head unit that supports the wireless streaming of music for (IIRC) £49. It also has 3.5mm jack input and USB amongst other things.
I was in there last night and picked up a 'upcoming offers' leaflet. They will also be selling lots of American foods as well as Samuel Adams beer (a very nice US brew indeed). I'll post links as soon as they do.