Starting today, you can share forms you create to your Google+ Circles. I would expect to see Google+ sharing for other Google Docs coming pretty soon now. Note, effectiveness of Google+ as sharing venue depends on much your target audience uses Google+. I wouldn't rely on it as primary distribution channel just yet. You still want to publicize surveys/forms in other ways.
See http://googledocs.blogspot.com/2012/02/january-in-review-styles-sparklines.html for a screenshot of the sharing screen.