Restarting a thread I've had on the RIAA and the downturn in music sales: DenverPost.com - ENTERTAINMENT:

The best-selling "Chicago" movie soundtrack is available on CD starting at $13.86. The actual movie, with the soundtrack songs included, of course, plus additional goodies ranging from deleted musical numbers to the director's interview and a "making-of" feature, can be had for precisely $2.12 more. Therein lies the problem for a critically wounded music recording industry: The "Chicago" CD looks like a rip-off, and the DVD looks like a steal.