The wait is finally over! The Alabama Archives has now added the remaining names (surnames beginning with W, X, Y & Z) to the Civil War Soldier Index.
From the website:
This database was created from an 8 x 5 card file maintained by the Alabama Department of Archives and History from the early 1900s until 1982. As staff came across information related to Alabama individuals during the American Civil War, a card was created. Information on individuals exempted from military service, or who served in the militia or home guard, is included. Soldiers from other states that have some connection to Alabama are also included. If new information was discovered from another source, another card was created. Multiple cards for an individual often exist. Sources include muster rolls, governors’ correspondence, veterans’ censuses, manuscript collections, newspapers, and pension records. Names, places and events are often inconsistently spelled. This card file is in no way inclusive. Not every individual who served from Alabama is present in the card file. Every card contains empty fields. Because much of the documentation relating to the Army of Tennessee was lost, soldiers that served in that army tend to be poorly documented. The cards are arranged alphabetically by last name. Since all of this information is available online, the actual cards are closed.
You can search the complete database here.