Looks like click fraud and botnet activity is on the increase for ppc advertisers. Read the report from Click Forensics for a detailed breakdown.

Do you think you’ve got what it takes to optimise a website to rank high in Google?
Well if you’d like a chance to prove your search engine optimisation skills Damien Mulley has an SEO competition running where participants must create a website on a brand new domain name and try to get it to the [...]