css, ajax, php, mysql programmer required to make homepage show latest activity as an ajax scroller

I need a change in my website. I want to place a frame into my website. This frame will load the content from cache, and scroll automatically. I want to place "Latest activities" box in the main column. All contents for this box should be loaded from cache, and I want to have the box large enough to display 5 activities at a time. I want to put this box between blue box (Ask your question fast) and 4 tabs (look at screenshot). This job requires knowledge of PHP, MySQL, HTML and CSS. You need to know about Ajax also. I want this frame load the content from cache (not from database), so it can reduce the queries. I'm looking for a developer has experimence with optimizing Php and MySQL.