This influence/importance can also be seen in the existence of GeoDjango, which is shipped with Django itself[0], where Ruby seems to have the old GeoRuby[1], the rather recent (and with unsure following) RGeo[2] or doing raw PostGIS.
Also in OpenGEO, looking at their projects, aside from PostGIS it's either Python (and JS) or Java (and JS)
Also in OpenGEO, looking at their projects, aside from PostGIS it's either Python (and JS) or Java (and JS)
[0] https://docs.djangoproject.com/en/dev/ref/contrib/gis/
[1] http://rubyforge.org/projects/georuby/
[2] http://dazuma.github.com/rgeo/