I will looking at using http://www.kontera.com which picks out keywords from my blog posts. Can I use this even though I have adsense ads in the Sidebar?
Definitely you can. Hubpages is set up for users with adsense and kontera accounts. Personally I dislike konterra as it detracts from the look of content and makes it look too commercial. Too much advertising has put me off magazines. I reckon you should keep to 30% ads 70% content. Another pet hates are pop ups and pop unders.