I had someone write a paper for me, now I think it is plagiarized from Wikipedia and some blogs. What is the name of that website that checks for copied blog posts and rewrites?
if you have a copyright notice on your website/blog - and whoever ripped you off has a dime to his/her name - sue the hell out of them. If they have nothing - then still scare them at least. I deal with crap like this all the time [online art gallery] and trust me, word goes around if you are enforcing your rights.