We don't delete any posts, so all of your posts are still on the site. To see all posts you've made, you can always click your avatar to go to your profile (or go to Users->My Profile). In there, click the "Posts" link on the left, and you'll get to a page like the below, which shows all of your posts:
www.sourcecoast.com/forums/profile/posts?user_id=3110
Hope that helps!
My Posts
