They have a good selection of albums at £3 to download including:
Snow Patrol - A Hundred Million Suns, Eyes Open, Final Straw
Take That - The Circus, Beautiful World
Mamma Mia Sountrack
Kings of Leon - Only by the Night
Coldplay - Viva la Vida, X & Y and more, about 40 - 50 in total
I can't seem to get the direct link to work, but if you go to their main page there is a section near the top right hand corner of the screen to visit the MP3 shop.