Link to the code to make a list at the bottom of a single post page in wordpress to other posts in the same category.
It lists all posts in the category which may be a few too many. Need to see if I can work out how to just list the last 5 or so. Another step closer to moving this blog to WordPress.

http://www.sns.ias.edu/~cjm/wp/2006/01/20/wordpress-related-posts-code/

Update - saw how to limit the posts in the code. It was 10 by default, but the list gets a bit long, so I have changed it to 5.