One potential solution to spam and personalization of results lies in doing the job on your machine, much like you can get rid of spam in your local mailbox. I

One potential solution to spam and personalization of results lies in doing the job on your machine, much like you can get rid of spam in your local mailbox. I'd recommend 'Seeks', (http://www.seeks-project.info/ http://www.seeks-project.info/). It requires you run it on your machine, or use a public node. Though while on your machine, it 'learns' from your navigation and re-ranks the results based on these local data. Additionally I use regexps to remove websites I don't want to hear about, like expertexchange.com.