Too many changes to summarize here since the last update. For a complete list see: http://www.isi.edu/~johnh/SOFTWARE/FSDB/perl-Fsdb-2.50_README.html
FSDB is package of commands for manipulating flat-ASCII databases from shell scripts. FSDB is useful to process medium amounts of data (with very little data you'd do it by hand, with megabytes you might want a real database).