) If 21.3 has indeed been released (been waiting for it), I will work on polishing ) it up for a new Cygwin package.
There appears to be a copy available from http://ftp.gnu.org/gnu/emacs/ .
I spoke too soon -- I am actually waiting for 21.4, which has Cygwin support integrated. 21.3 is just a bugfix release. -- Joe Buehler
