Search engine for web page source code

[Dreamkatcha]

Out of curiosity I want to get an idea of how many people are using particular blog/web page templates. I thought the best way to go about it would be to take a unique string of source code and paste it into a search engine capable of delving into the nuts and bolts of web pages.

So my question is, does anyone know of one, or is there an operator you can use with Google to get the job done?

[varmit]

http://openwebdesign.org/

[Dreamkatcha]

I'm a big fan of OWD (and that other one which has the same content with a different interface), but that's not quite what I was looking for.