Collect last 50 forum topics, show randomly on Home Page

I want to display random forum topics on my website home page. The forum topics should only be chosen randomly, out of the last 50 forum topics. I would like each topic to show on the home page, for about 5-10 seconds, then fade away, and show another random topic. This will repeat forever. As new topics are posted in the forum, they will appear randomly on the home page in this ajax feed. my site is [login to view URL] (its using phpbb2) Register to the site, go through forum, and check out phpbb2 before you bid. Must display Topic Name, Category (catgory is linked to category, topic name is linked to topic) Thanks ## Deliverables Please explain to me, how i can change colors, style, etc. I will do the css or flash styling