Digital Music Stores
As we mention elsewhere in The Survival Guide, the CD is dead. Your best bet for music sales are digital music stores, rather than physical ones. People don't want to pay for shipping, they don't want to carry the CDs around with them, they don't want to store the CD, and they don't want the jewel case. Digital music sales are the way to go for all musicians, not just indies. Services like CD Baby and Tunecore handle digital distribution. Also, disc replicators and duplicators have gotten into this area as well such as DiscMakers (which now owns CD Baby) and Nimbit. For a complete listing see IndieBandSurvivalGuide.com.
We have been happy with CDBaby's digital music program, as they take care of converting your music into all of the formats that each separate service requests. They also take care of consolidating the accounting. If you choose to use their service, you have the added advantage of having them take care of both online physical CD sales as well as the digital sales. Please note that they do take a cut.