I'm still trying to find a way to view users comments including my own. The closest thing I've found so far is to follow a user and their comments will show up in your home feed (the little house icon in the upper right).

While the overwhelmed servers seem to be messing with it a little, your notification box should notify you when somebody replies to your comments. When someone replies, the little list icon in the upper right expands and notifies you of a reply. If you click it you can actually see your past notifications and links to your comments people have replied to.

Edit: The user account I was using to try to find comments may just not have comments, but you can see user comments from their feed by going to Snapzu.com/username or clicking their name.