At this time none of the stores are able to display liner notes.
TuneCore removed the feature that allowed customers to enter liner notes on their release since the information was not being sent to the stores.
iTunes and the other stores tend to gather additional album information, such as artist bios and album reviews directly from a data provider, Rovi. We are not affiliated with them at this time, but if you are able to have Rovi post your album info, that will feed information into many of the other sites including Napster, eMusic, Amazon, iTunes and more. You can learn more about the submission process here .