I'm bumping this list to the top of The Paycheck Chronicles because many states have recently issued directions on the impact of the Military Spouses Residency Relief Act on income taxes. If you have a link that I don't have, please let me know. This will be a work-in-progress and I will update it constantly.
There are so many issues and hopefully some of these links will help you find answers!
Arkansas: Military Spouses Residency Relief Act
California: Military Spouses Residency Relief Act (doesn't say much except to check back later, but this is the right page.), Business Wire article
Colorado: Spouses of U.S. Military Servicemembers Tax Information, guidance from Department of Revenue
District of Columbia: Taxation of Compensation of Military Members and Spouses
Georgia: Withholding and Taxation of Certain Nonresident Military Spouses
Idaho: Idaho Tax Commission FAQs
Illinois: Schedule MR, Publication 102, Illinois Withholding Form IL-W4
Iowa: Iowa 2009 Expanded 1040
Kansas: Spouses of United States Military Service Members
Kentucky: Hot Topics
Louisiana: Revenue Information Bulletin: Military Spouses Residency Relief Act
Maine: Maine Tax Alert November 2009 (about 1/4 of way down)
Maryland: Employer Withholding Tax Alert, MW507 (Withholding Certificate, with instructions for military spouses), Administrative Release No 1. Military Personnel and Civilian Spouses
Massachusetts: Working Draft of Technical Information Release 09-23 (this is not a final release but rather their working copy)
Missouri: Page 13 of Reference Guide,
New Hampshire: Driver's License Information
New Jersey: Military Spouses Residency Relief Act
New York: Certificate of Exemption from Withholding, Taxpayer Guidance Military Spouses Residency Relief Act, New York State Income Tax Information For Military Personnel and Veterans, Publication 361
North Carolina: Important Tax Information Regarding Spouses of United States Military Servicemembers, one person's instructions on how to get a refund of NC taxes paid, NC FAQ Regarding MSRRA
Ohio: Ohio Department of Taxation FAQ's Military Page, Ohio Department of Taxation Non-Resident Military Spouse Page
Oklahoma: Directions for Non-Residents Who Are Not Required to File (see page 4, though it isn't terribly clear.)
South Carolina: Military Spouses Residency Relief Act
Virginia: 2009 Tax Relief for Spouses of Military Personnel, Tax Bulletin 9-10
Keep sending me links and I'll keep adding them!