Evaluating a System for Selling and Delivering MP3s?

Dredd2Kad asks: "I'd really like Slashdot's opinion on this. I recently secured an MP3 distribution deal with an indie record label, and negotiations with other indie labels and artists are in the works. The music will be distributed through my internet radio station's website. As you know, if you can sell music in a format such as MP3 you eliminate the costs of packaging, shipping, handling. You do have to contend with bandwidth charges though. Most indie labels and artists seem happy to pass along the savings to customers and stimulate sales. What I have built is simple and functional. We are trying to add value to the MP3 albums we sell by including quality artwork that can be printed onto CD labels and jewel case inserts (so you aren't just getting a 'bunch of files'). What would make you want to buy music in this way? What types things would turn you away? What are the positives and negatives of selling music in this manner? Do you think this is a viable alternative to someone who doesn't want to pay $10 or $15 for a physical CD? Does the format the music is in or on have an impact on how serious you take it?"