From ABA's FAQ. Provided PDQ
Q: To comply with the notification requirements in the November rules from the FDIC, in 2010 we notified our IOLTA account holders that they would not be eligible for the unlimited FDIC coverage as of January 1, 2011. Should we contact these IOLTA customers to let them know about the change and that IOLTA accounts are now fully insured?
A: The FDIC states that Insured Depository Institutions that already sent the notice required in the November final rule to IOLTA depositors are encouraged, but not required, to send a revised notice to such IOLTA depositors that their funds will be fully insured from December 31, 2010 through December 31, 2012. There is no prescribed wording for this notice.
And FWIW, we are doing a direct "Good News" letter to our IOLTA customers.