Should you spend your marketing budget on paid search marketing or search engine optimisation?

I just came across this report that talks about how the dynamic of Search Engine marketing is changing – specifically looking at the fact that 80% of clicks go to the organic results, but an increasing amount of business revenue is coming from Paid Search.

It also looks at how Organic Search results are changing and how that impacts the mix. Have a look athttp://videos.webpronews.com/2010/07/16/paid-search-to-overtake-organic/