CT DEP has a clickable map for launch sites here:http://www.depdata.ct.gov/maps/boating/boatingmap.htm
and a list of towns along the sound that have launches here:http://www.lisrc.uconn.edu/coastalaccess/
I live in Durham (very close to Middletown), so the best sailing for me will likely be the Sound or the CT River. I'm also going to explore some of the larger lakes in the area (I "poached" a sail on Lake Pocotopaug in East Hampton last fall- only supposed to be open to town residents!) Where do you live?