Hello!

I am trying to create a map, or a tree diagram if you will, of all the posts stored in a database, like so: "http://www.zolomon.eu/misc/treediagram.jpg". Could anyone provide me with tips of how I would be able to achieve something similar to this, or if there already are premade solutions like Flash diagrams?

I have:
post_id = ID for each post
link_id = ID for the post which the current post links to, (ex: link_id = 1, then if post_ID = 2 this means that the current post, which is 2, links to the first post, which is 1)

Any help at all is appreciated,
Cheers!