Comments I've made on Google+:

https://plus.google.com/s/%22Philip%20Durbin%22%20-inurl%3A107770072576338242009

See also http://webapps.stackexchange.com/questions/17980/how-can-i-find-my-comment-on-a-google-post-when-no-one-has-commented-after-me/30900#30900