I've had the exact same fraudulent check transactions as some of the other people mentioned already on this forum.
The checks cashed were for $100 each, were never signed and/or authorized by me and cashed/processed by Bank of America. Dates were also exactly the same, as the first check was dated 02/28/2007 and the second was dated 06/01/2007
I have already filed a dispute with my bank for these unauthorized withdrawals.
The people at Intabill are friendly and helpful, but claim they are not responsible for these charges and have had more complaints already.
How this company got a hold of my account information is a mystery to me. I have asked my bank to block my account and and after I have my money returned I will close this bank account as I can no longer trust my information to be safe.