what do you mean, 'revive'? The Square hasn't died. Just depends on where you are. Lake Norman YC has a fleet, and there's a small fleet central Gulf.

Here's a website:
http://www.geocities.com/mec_coleman/18square.htm

The Square doesn't HAVE to be wide. There is no restriction on beam. It just makes sense to have the width if you can do so. If I recall, (and Dave can chime in) Tilley is building what is effectively a narrow-beam Square. Of course those who know Tilley know how tall he is, so he makes his own righting moment ;-)