Project as discussed via Skype:
1) Show Related Posts on WP / Use Algorithm Of Sample Plugin For Post Relevancy - Show X Related Topics Below Content
2) Auto-Create Post With The Title / The Excerpt For Existing Posts + New Published Posts
Use a blank WP/Q2A Install and add functions to retrieve related posts like show_related_Q2A_posts
As for the auto-creation, make sure I can modify the title easily / comment in the code
Also make sure to add the_excerpt to a variable and the text box of the question ( please add a comment in the source so I can change this behaviour easily)