Ad Placement Review - Too few?

Hi, I've just redesigned my site at http://www.wi-cn.com.

I've just placed a sitewide skyscraper at the right, and a sitewide adlinks in the resources block on the left. Should I place some more ads or would it be too much? Maybe in the articles themselves?

Thanks!

 

place in the articles themselves. this will keep down your bounce rate.

 

placed some in the articles, thanks (hope they blend well)