There is discussion group for Vegetarian Travelers on CouchSurfing:
the site: http://www.couchsurfing.org
At the moment that I created this post, this group was small, but maybe we can change that with time.
info from the group page:
Are you a vegetarian? Do you have trouble finding good food when you travel? This is a forum where you can post rants & raves, make suggestions for fellow travelers & post reviews of restaurants, airport food & anything else related to vegetarian travel.