"Rhode Island, here we come," the spokeswoman quoted the billionaire investor as saying in an e-mail on Thursday after reading about state Treasurer Frank Caprio's appeal.
After Berkshire Hathaway Inc announced plans to start a new insurer that would help state and local governments lower their borrowing costs, Caprio sent a letter to Buffett.
Berkshire Hathaway Assurance Corp is entering the $2.5 trillion U.S. municipal bond market at a time when established rivals are suffering from a loss of confidence because of exposure to faltering subprime mortgages.
Berkshire received an operating license from New York state's insurance department on Dec. 28, and is expected to expand into California, Florida, Illinois, Texas and Puerto Rico, which are among 10 largest municipal bond issuers.
Caprio said he hoped Berkshire Hathaway would move quickly to seek necessary licensing to do business in Rhode Island.
"At a time when a number of existing bond insurers are facing extensive losses due to their decisions to insure mortgage-related bonds, Berkshire Hathaway's entry into this market would be a very positive development for the state and all of Rhode Island's cities and towns," Caprio said in a letter to Buffett, according to a statement released earlier this week.
Rhode Island and its local governments sold $1.4 billion of bonds last year, according to Thomson Financial.