Labels should really get it together and offer some sort of "digital booklet" with their downloads. Not only is it good for displaying the album credits, it boosts the value of the legal download. Many illegal downloads already contain full high quality scans of the album art and booklet, in addition to being better sound quality (FLAC or even 24/96K LP rips) than iTunes offers.
I feel like labels shortchanging customers (by giving them low quality files and no booklet/liner notes) for nearly the same price as a physical CD is part of what is turning off music customers to buying music. Also having the album credits invisible to the customer is no good for producers/engineers/session musicians who rely on the credits as a "business card".