Text/html widget, which is available in Wordpress dashboard, is your best option for placing Adsense ads since you can reposition it in any way you want.
I did try that but was just getting a large white gap. It's still happening on my Adsense ready theme now If you go to http://www.myfreeps3.net/ps3-news/ the white space on the right sidebar should be adsense.
The problem is that you are have too many ads on your front page - it suppresses it automatically (and, isn't that against google TOS anyway?) It works fine on the individual posts
Oh right, thanks guys. I'm new to Adsense and didn't know this. I've just got rid of the adsense in the blog posts.