Scrape SERPs for Wordpress Blogs

I seem to be begging for info a lot lately, and I appreciate the help.

I am wanting to scrape serps for blog entries for an auto-commenter. I know about Google blog search and that is helpful, except I really need to be able to differentiate between Wordpress Blogs, Moveable Type Blogs, Blogengine, etc, etc.

I know some programs like scrapebox are able to scrape Google and other engines for specific blog types, does anyone know the correct "footprints" to search for?

Thanks.

Nevermind, I finally found the proper footprints:

Wordpress:
"Powered By Wordpress"
"Leave a Reply" +"Name (required)"
"Leave a Comment" +Name
"Notify me of follow-up comments via email"


Well, anyway, hope this helps someone.