As of April 5th 2008....
Honors Indiana Permit:
Alabama, Alaska, Arizona, Arkansas, Georgia, Idaho, Kentucky, Louisiana, Mississippi, Missouri, Montana, North Carolina, North Dakota, Oklahoma, Pennsylvania, South Dakota, Tennessee, Texas, Utah, Vermont, Wyoming
Indiana Permit Not Honored:
California, Connecticut, Delaware, Hawaii, Illinois, Iowa, Kansas, Maine, Maryland, Massachusetts, Minnesota, Nebraska, Nevada, New Jersey, New Mexico, New York, Ohio, Oregon, Rhode Island, South Carolina, Virginia, Washington, West Virginia, Wisconsin, District of Columbia
Indiana Resident Permits Only:
Colorado, Florida, Michigan, New Hampshire
source-
Handgunlaw.us