http://petewarden.typepad.com/searchbrowser/2010/01/how-to-f...
http://web.mailana.com/labs/findbyemail/index.php?email=j%40...
Doubt that's you though, probably just an MD5 clash, since it's a long way from the Netherlands?
I only see one other check in my access log from the same IP that checked for your address about an hour ago; mishu<snip>.com. That did find a flickr account, though it appears to be private, so not much info there.
Sorry, I remain not scared.
(bonus points if someone does it and gets all 3 :))
But I know that data exists - and for now I am happy for people to discover it about me.
Speaking for non-techy types, though, it is something to be concerned about. Less so for marketers as things like stalkers and fraudsters etc. It's worth raising these issues gently to try and encourage people to understand what data is accessible about them - and ensure their comfortable with that.
http://petewarden.typepad.com/searchbrowser/2009/12/what-can...
The scary thing is that if they can get your full name and rough location, it's then often possible to get a full address (see whitepages.com for a consumer-facing example). That then ties into other datasets that have information on income, occupation, marital status, etc for every household in the US.