I have shares of First National Bankshares of Florida, Inc. and cannot find out anything about them. They were listed on the NYSE under FLB. Any ideas?

It was bought out by Fifth Third Bank on January 1, 2005. At that time shareholders received 0.5065 shares of Fifth Third Bank (FITB) for each share of First national Bankshares of Florida that they owned at the time. See:
Fifth Third Completes Acquisition of First National Bankshares of Florida, Inc. -- re> CINCINNATI, Jan. 3 /PRNewswire-FirstCall/ --